Walnut ( In hindi Language Akroot)

Walnut

Juglans regia, the Persian walnut, English walnut, or especially in Great Britain, common walnut, is an Old World walnut tree species native to the region stretching from the Balkans eastward to the Himalayas and southwest China. The largest forests are in Kyrgyzstan, where trees occur in extensive, nearly pure walnut forests at 1,000–2,000 m altitude (Hemery 1998)—notably at Arslanbob in Jalal-Abad Province.

Description

Juglans regia is a large, deciduous tree attaining heights of 25–35 m, and a trunk up to 2 m diameter, commonly with a short trunk and broad crown, though taller and narrower in dense forest competition. It is a light-demanding species, requiring full sun to grow well.
The bark is smooth, olive-brown when young and silvery-grey on older branches, and features scattered broad fissures with a rougher texture. Like all walnuts, the pith of the twigs contains air spaces; this chambered pith is brownish in color. The leaves are alternately arranged, 25–40 cm long, odd-pinnate with 5–9 leaflets, paired alternately with one terminal leaflet. The largest leaflets are the three at the apex, 10–18 cm long and 6–8 cm broad; the basal pair of leaflets are much smaller, 5–8 cm long, with the margins of the leaflets entire. The male flowers are in drooping catkins 5–10 cm long, and the female flowers are terminal, in clusters of two to five, ripening in the autumn into a fruit with a green, semifleshy husk and a brown, corrugated nut. The whole fruit, including the husk, falls in autumn; the seed is large, with a relatively thin shell, and edible, with a rich flavor.

<Male Flower

< Female Flower

                                   Walnut Fruits>

< Walnut Seeds

                                                Taxonomic  Keys

<Foilage

                                                           

                    Walnut Bark 

<Habit 

 

 

 

 

Cultivars

J. regia 'Buccaneer' produces an abundant crop of seeds. A self-fertile cultivar, it produces pollen over a long period and is thus a valuable pollinator for other cultivars. The tree is about the same size as an open-pollinated walnut, it comes into leaf very late and so usually avoids damage by late frosts.                                                                                 Walnut from Poland
The Old English term wealhhnutu is a late book-name (Old English Vocabularies, Wright & Wulker), so the remark that the Anglo-Saxons inherited the walnut tree from the Romans does not follow from this name.

Distribution and habitat

Original habitat

J. regia is native to the mountain ranges of Central Asia, extending from Xinjiang province of western China, parts of Kazakhstan, Uzbekistan and southern Kirghizia and from lower ranges of mountains in Nepal, Bhutan, Tibet, northern India and Pakistan, through Afghanistan, Turkmenistan and Iran to portions of Azerbaijan, Armenia, Georgia and eastern Turkey. In these countries, there is a great genetic variability, in particular ancestral forms with lateral fruiting. During its migration to western Europe, the common walnut lost this character by natural selection on account of competition with other vigorous forest species, such as oaks. They became large trees with terminal fruiting. A small remnant population of these J. regia trees have survived the last glacial period in Southern Europe, but the bulk of the wild germplasm found in the Balkan peninsula and much of Turkey was most likely introduced from eastern Turkey by commerce and settlement several thousand years ago.

Introduction around the world

In the fourth century BC, Alexander the Great introduced this "Persian nut" (Theophrastus' καρυα ή Περσική) in Macedonian and Greek ancestral forms with lateral fruiting from Iran and Central Asia. They hybridized with terminal-bearing forms to give lateral-bearing trees with larger fruit. These lateral-bearers were spread in southern Europe and northern Africa by Romans. Recent prospections in walnut populations of the Mediterrean Basin allowed to select interesting trees of this type. In the Middle Ages, the lateral-bearing character was introduced again in southern Turkey by merchants traveling along the Silk Road. J. regia germplasm in China is thought to have been introduced from Central Asia about 2000 years ago, and in some areas has become naturalized. Cultivated distribution now includes North and South America (Chile, Argentine), Australia, New Zealand, South Africa and Japan. So, the Persian walnut is grown from 30° to 50° of latitude in the Northern Hemisphere and from 30° to 40° in the Southern Hemisphere.
The walnut was introduced into western and northern Europe very early, by Roman times or earlier, and to the Americas by the 17th century, by English colonists. Important nut-growing regions include France, Serbia, Greece, Bulgaria, and Romania in Europe, China in Asia, California in North America, and Chile in South America. Lately, cultivation has spread to other regions, such as New Zealand and the southeast of Australia. It is cultivated extensively for its high-quality nuts, eaten both fresh and pressed for their richly flavored oil; numerous cultivars have been selected for larger nuts with thinner shells.
The Latin name for the walnut was nux Gallica, "Gallic nut"; the Gaulish region of Galatia in Anatolia lies in highlands at the western end of the tree's presumed natural distribution.
For the etymology and meaning of the word in English and other Germanic languages, see our article "walnut". In the Chinese language, the edible, cultivated walnut is called 胡桃 (hú táo in Mandarin), which means literally "Hu peach", suggesting the ancient Chinese associated the introduction of the tree into East Asia with the Hu barbarians of the regions north and northwest of China. In Mexico, it is called nogal de Castilla,suggesting the Mexicans associated the introduction of the tree into Mexico with Spaniards from Castile.

Ecology

Walnut Fruits and Leaves

•  

•  

        Mature tree>

 

 

 

 

 

Nutritional value

Persian or English walnut, Juglans regia
Nutritional value per serving
Serving size	100 grams
Energy	2,738 kJ (654 kcal)
Carbohydrates	13.71
- Starch	0.06
- Sugars	2.61
- Lactose	0
- Dietary fiber	6.7
Fat	65.21
- saturated	6.126
- monounsaturated	8.933
- polyunsaturated	47.174
Protein	15.23
Water	4.07
Alcohol	0
Caffeine	0
Vitamin A equiv.	1 μg (0%)
Vitamin A	20 IU
- beta-carotene	12 μg (0%)
- lutein and zeaxanthin	9 μg
Thiamine (vit. B1)	0.341 mg (30%)
Riboflavin (vit. B2)	0.15 mg (13%)
Niacin (vit. B3)	1.125 mg (8%)
Pantothenic acid (B5)	0.570 mg (11%)
Vitamin B6	0.537 mg (41%)
Folate (vit. B9)	98 μg (25%)
Vitamin B12	0 μg (0%)
Vitamin C	1.3 mg (2%)
Vitamin D	0 μg (0%)
Vitamin D	0 IU (0%)
Vitamin E	0.7 mg (5%)
Vitamin K	2.7 μg (3%)
Calcium	98 mg (10%)
Iron	2.91 mg (22%)
Magnesium	158 mg (45%)
Manganese	3.414 mg (163%)
Phosphorus	346 mg (49%)
Potassium	441 mg (9%)
Sodium	2 mg (0%)
Zinc	3.09 mg (33%)
Percentages are relative to US recommendations for adults. Source: USDA Nutrient Database

A study of ten cultivars of J. regia in Turkey showed significant variations in fatty acid content:

• 62% - 71% fat
• saturated fat (as a percentage of total fatty acids):
• 5.2% - 7.3% palmitate
• 2.6% - 3.7% stearate
• unsaturated fat (as a percentage of total fatty acids):
• 21.2% - 40.2% oleate (monounsaturated)
• 43.9% - 60.1% linoleate (diunsaturated)
• 6.9% - 11.5% linolenate (triunsaturated)

Potential biological effects

Walnuts and other tree nuts are important food-allergen sources that have the potential to be associated with life-threatening, IgE-mediated systemic reactions in some individuals.
The extracts of walnuts have antioxidant and antiproliferative activity due to a high phenolic content.
In vitro tests of walnut extract have shown a high antiatherogenic potential and osteoblastic activity, suggesting a potential beneficial effect of a walnut-enriched diet on cardioprotection and bone loss.
The extract from walnut leaves is an antioxidant, decreases the blood sugar level and has a positive impact on lipid metabolism. The extract suppresses functional insufficiency of liver, links synthethising enzymes, increases the antitoxic action of hepatocytes and improves the functional insufficiency of kidneys. The ethanolic extract from leaves of J. regia has an antidiabetic effect on diabetes-induced rats.
Bark and leaf crude extracts of J. regia ,and J. mollis , showed in vitro activity against Mycobacterium tuberculosis.

Culture

In Skopelos, a Greek island in the Aegean Sea, local legend suggests whoever plants a walnut tree will die as soon as the tree can "see" the sea. This has not been proven as fact; however, it might take some time to find a local arborist willing to take on the job of planting a walnut tree. Most planting is done by field rats (subfamily Murinae). In Flanders, a folk saying states: "By the time the tree is big, the planter surely will be dead." (Dutch: Boompje groot, plantertje dood). This saying refers to the relatively slow growth rate of the tree.

Cultivation

Walnut trees grow best in rich, deep soil with full sun and long summers, such as the California central valley. In the U.S., J. regia is often grafted onto a rootstock of native black walnut, Juglans hindsii to provide disease resistance. Other plants often will not grow under walnut trees because the fallen leaves and husks contain juglone, a dark-brown chemical which acts as a natural herbicide. Horses that eat walnut leaves may develop laminitis, a hoof ailment. Mature trees may reach 50 feet in height and width, and live more than 200 years, developing massive trunks more than eight feet thick.

Other uses

Walnut heartwood is a heavy, hard, open-grained hardwood. Freshly cut live wood may be Dijon-mustard color, darkening to brown over a few days. The dried lumber is a rich chocolate-brown to black, with cream to tan sapwood, and may feature unusual figures, such as "curly", "bee's wing", "bird's eye", and "rat tail", among others. It is prized by fine woodworkers for its durability, luster and chatoyance, and is used for high-end flooring, guitars, furniture, veneers, knobs and handles.
American pioneers used juglone from ground walnut husks and leaves to make deep-brown ink, paints and wood stains.
Green husk extracts of walnut have insecticidal properties; it killed 98% of Tetranychus cinnabarinus (carmine spider mites) in one study.  

Garlic

Allium sativum, known as garlic, from William Woodville, Medical Botany, 1793.
Scientific classification
Kingdom:	Plantae
clade:	Angiosperms
clade:	Monocots
Order:	Asparagales
Family:	Amaryllidaceae
Subfamily:	Allioideae
Genus:	Allium
Species:	A. sativum
Binomial name
Allium sativum

Allium sativum, commonly known as garlic, is a species in the onion genus, Allium. Its close relatives include the onion, shallot, leek, chive, and rakkyo. Dating back over 6,000 years, garlic is native to central Asia, and has long been a staple in the Mediterranean region, as well as a frequent seasoning in Asia, Africa, and Europe. It has been used throughout its history for both culinary and medicinal purposes.

Origin and major types

 

Bulbils

The ancestry of cultivated garlic is not definitively established. According to Zohary and Hopf, "A difficulty in the identification of its wild progenitor is the sterility of the cultivars", though it is thought to be descendent from the species Allium longicuspis, which grows wild in central and southwestern Asia. Allium sativum grows in the wild in areas where it has become naturalised. The "wild garlic", "crow garlic", and "field garlic" of Britain are members of the species Allium ursinum, Allium vineale, and Allium oleraceum, respectively. In North America, Allium vineale (known as "wild garlic" or "crow garlic") and Allium canadense, known as "meadow garlic" or "wild garlic" and "wild onion", are common weeds in fields. One of the best-known "garlics", the so-called elephant garlic, is actually a wild leek (Allium ampeloprasum), and not a true garlic. Single clove garlic (also called pearl or solo garlic) originated in the Yunnan province of China.

European garlic

Italian garlic PDO (Aglio Bianco Polesano)

There are a number of garlics with Protected Geographical Status in Europe; these include:

• Aglio Bianco Polesano from Veneto, Italy (PDO)
• Aglio di Voghiera from Ferrara, Emilia-Romagna, Italy (PDO)
• Ail blanc de Lomagne from Lomagne in the Gascony area of France (PGI)
• Ail de la Drôme from Drôme in France (PGI)
• Ail rose de Lautrec a rose/pink garlic from Lautrec in France (PGI)
• Ajo Morado de Las Pedroñeras a rose/pink garlic from Las Pedroñeras in Spain (PGI)

Varieties

While botanists classify garlic under the umbrella of the species, Allium sativum, there are also two main subspecies.

• Ophioscorodon, or hard necked garlic, includes porcelain garlics, rocambole garlic, and purple stripe garlics.

• Sativum, or soft necked garlic, includes artichoke garlic, silverskin garlic, and creole garlic.

Bulb garlic is available in many forms, including fresh, frozen, dried, fermented (black garlic) and shelf stable products (in tubes or jars). In addition, see Culinary uses for other edible parts of the garlic plant.

Cultivation

Garlic is easy to grow and can be grown year-round in mild climates. While sexual propagation of garlic is indeed possible, nearly all of the garlic in cultivation is propogated asexually, by planting individual cloves in the ground In cold climates, cloves are planted in the fall, about six weeks before the soil freezes, and harvested in late spring. Garlic plants are usually very hardy, and are not attacked by many pests or diseases. Garlic plants are said to repel rabbits and moles. Two of the major pathogens that attack garlic are nematodes and white rot disease, which remain in the soil indefinitely once the ground has become infected. Garlic also can suffer from pink root, a typically nonfatal disease that stunts the roots and turns them pink or red.
Garlic plants can be grown close together, leaving enough room for the bulbs to mature, and are easily grown in containers of sufficient depth. When selecting garlic for planting, it is important to pick large heads from which to separate cloves. Large cloves, along with proper spacing in the planting bed, will also improve head size. Garlic plants prefer to grow in a soil with a high organic material content, but are capable of growing in a wide range of soil conditions and pH levels.
There are different types or subspecies of garlic, most notably hardneck garlic and softneck garlic. The latitude where the garlic is grown affects the choice of type as garlic can be day-length sensitive. Hardneck garlic is generally grown in cooler climates; softneck garlic is generally grown closer to the equator.
Garlic scapes are removed to focus all the garlic's energy into bulb growth. The scapes are sold separately for cooking.

Production trends

Garlic output in 2005

Garlic is grown globally, but China is by far the largest producer of garlic, with approximately 10.5 million tonnes (23 billion pounds) grown annually, accounting for over 77% of world output. India (4.1%) and South Korea (2%) follow, with Egypt and Russia (1.6%) tied in fourth place and the United States (where garlic is grown in every state except for Alaska) in sixth place (1.4%). This leaves 16% of global garlic production in countries that each produce less than 2% of global output. Much of the garlic production in the United States is centered in Gilroy, California, which calls itself the "garlic capital of the world"

Top 10 garlic producers — 11 June 2008
Country	Production (tonnes)	Footnote
China	12,088,000	F
India	645,000	F
South Korea	325,000	F
Egypt	258,608	F
Russia	254,000	F
United States	221,810
Spain	142,400
Argentina	140,000	F
Myanmar	128,000	F
Ukraine	125,000	F
World	15,686,310	A
No symbol = official figure, P = official figure, F = FAO estimate, *= unofficial/semiofficial/mirror data, C = calculated figure, A = aggregate (may include official, semiofficial, or estimates).

Culinary uses

Garlic being crushed using a garlic press

Garlic is widely used around the world for its pungent flavor as a seasoning or condiment.
The garlic plant's bulb is the most commonly used part of the plant. With the exception of the single clove types, garlic bulbs are normally divided into numerous fleshy sections called cloves. Garlic cloves are used for consumption (raw or cooked) or for medicinal purposes. They have a characteristic pungent, spicy flavor that mellows and sweetens considerably with cooking.
Other parts of the garlic plant are also edible. The leaves and flowers (bulbils) on the head (spathe) are sometimes eaten. They are milder in flavor than the bulbs, and are most often consumed while immature and still tender. Immature garlic is sometimes pulled, rather like a scallion, and sold as "green garlic". When green garlic is allowed to grow past the "scallion" stage, but not permitted to fully mature, it may produce a garlic "round", a bulb like a boiling onion, but not separated into cloves like a mature bulb. Additionally, the immature flower stalks (scapes) of the hardneck and elephant types are sometimes marketed for uses similar to asparagus in stir-fries.
Inedible or rarely eaten parts of the garlic plant include the "skin" and root cluster. The papery, protective layers of "skin" over various parts of the plant are generally discarded during preparation for most culinary uses, though in Korea immature whole heads are sometimes prepared with the tender skins intact. The root cluster attached to the basal plate of the bulb is the only part not typically considered palatable in any form.
Garlic is a fundamental component in many or most dishes of various regions, including eastern Asia, South Asia, Southeast Asia, the Middle East, northern Africa, southern Europe, and parts of South and Central America. The flavour varies in intensity and aroma with the different cooking methods. It is often paired with onion, tomato, or ginger. The parchment-like skin is much like the skin of an onion, and is typically removed before using in raw or cooked form. An alternative is to cut the top off the bulb, coat the cloves by dribbling olive oil (or other oil-based seasoning) over them, and roast them in an oven. Garlic softens and can be extracted from the cloves by squeezing the (root) end of the bulb, or individually by squeezing one end of the clove. In Korea, heads of garlic are fermented at high temperature; the resulting product, called black garlic, is sweet and syrupy, and is now being sold in the United States, United Kingdom and Australia.
Garlic may be applied to breads to create a variety of classic dishes, such as garlic bread, garlic toast, bruschetta, crostini and canapé.

Garlic being rubbed onto a slice of bread

Oils can be flavored with garlic cloves. These infused oils are used to season all categories of vegetables, meats, breads and pasta.
In some cuisines, the young bulbs are pickled for three to six weeks in a mixture of sugar, salt, and spices. In eastern Europe, the shoots are pickled and eaten as an appetizer.
Immature scapes are tender and edible. They are also known as "garlic spears", "stems", or "tops". Scapes generally have a milder taste than the cloves. They are often used in stir frying or braised like asparagus. Garlic leaves are a popular vegetable in many parts of Asia. The leaves are cut, cleaned, and then stir-fried with eggs, meat, or vegetables.
Mixing garlic with egg yolks and olive oil produces aioli. Garlic, oil, and a chunky base produce skordalia. Blending garlic, almond, oil, and soaked bread produces ajoblanco.
Garlic powder has a different taste from fresh garlic. If used as a substitute for fresh garlic, 1/8 teaspoon of garlic powder is equivalent to one clove of garlic.

Storage

Ready peeled garlic cloves sold in a plastic container

Domestically, garlic is stored warm [above 18°C (64°F)] and dry to keep it dormant (so it does not sprout). It is traditionally hung; softneck varieties are often braided in strands called plaits or grappes. Garlic is often kept in oil to produce flavoured oil; however, the practice requires measures to be taken to prevent the garlic from spoiling. Untreated garlic kept in oil can support the growth of deadly Clostridium botulinum. Refrigeration will not assure the safety of garlic kept in oil. Peeled cloves may be stored in wine or vinegar in the refrigerator.
Commercially prepared oils are widely available, but when preparing and storing garlic-infused oil at home, there is a risk of botulism if the product is not stored properly. To reduce this risk, the oil should be refrigerated and used within one week. Manufacturers add acids and/or other chemicals to eliminate the risk of botulism in their products. Two outbreaks of botulism related to garlic stored in oil have been reported.
Commercially, garlic is stored at 0°C (32°F), in a dry, low-humidity environment. Garlic will keep longer if the tops remain attached.

Historical use

Garlic has been used as both food and medicine in many cultures for thousands of years, dating at least as far back as when the Giza pyramids were built. Garlic is still grown in Egypt, but the Syrian variety is the kind most esteemed now (see Rawlinson's Herodotus, 2.125).
Garlic is mentioned in the Bible and the Talmud. Hippocrates, Galen, Pliny the Elder, and Dioscorides all mention the use of garlic for many conditions, including parasites, respiratory problems, poor digestion, and low energy. Its use in China was first mentioned in A.D. 510.
It was consumed by ancient Greek and Roman soldiers, sailors, and rural classes (Virgil, Ecologues ii. 11), and, according to Pliny the Elder (Natural History xix. 32), by the African peasantry. Galen eulogizes it as the "rustic's theriac" (cure-all) (see F. Adams' Paulus Aegineta, p. 99), and Alexander Neckam, a writer of the 12th century (see Wright's edition of his works, p. 473, 1863), recommends it as a palliative for the heat of the sun in field labor.
In the account of Korea's establishment as a nation, gods were said to have given mortal women with bear and tiger temperaments an immortal's black garlic before mating with them. This is a genetically unique, six-clove garlic that was to have given the women supernatural powers and immortality. This garlic is still cultivated in a few mountain areas today.
In his Natural History, Pliny gives an exceedingly long list of scenarios in which it was considered beneficial (N.H. xx. 23). Dr. T. Sydenham valued it as an application in confluent smallpox, and, says Cullen (Mat. Med. ii. p. 174, 1789), found some dropsies cured by it alone. Early in the 20th century, it was sometimes used in the treatment of pulmonary tuberculosis or phthisis.

Harvesting garlic, from Tacuinum sanitatis, 15th century (Bibliothèque nationale)

Garlic was rare in traditional English cuisine (though it is said to have been grown in England before 1548) and has been a much more common ingredient in Mediterranean Europe. Garlic was placed by the ancient Greeks on the piles of stones at crossroads, as a supper for Hecate (Theophrastus, Characters, The Superstitious Man). A similar practice of hanging garlic, lemon and red chilli at the door or in a shop to ward off potential evil, is still very common in India. According to Pliny, garlic and onions were invoked as deities by the Egyptians at the taking of oaths. (Pliny also stated garlic demagnetizes lodestones, which is not factual.) The inhabitants of Pelusium, in lower Egypt (who worshiped the onion), are said to have had an aversion to both onions and garlic as food.
To prevent the plant from running to leaf, Pliny (N.H. xix. 34) advised bending the stalk downward and covering with earth; seeding, he observes, may be prevented by twisting the stalk (by "seeding", he most likely meant the development of small, less potent bulbs).

Medicinal use and health benefits

Garlic, raw
Nutritional value per 100 g (3.5 oz)
Energy	623 kJ (149 kcal)
Carbohydrates	33.06 g
- Sugars	1.00g
- Dietary fiber	2.1 g
Fat	0.5 g
Protein	6.39 g
- beta-carotene	5 μg (0%)
Thiamine (Vit. B1)	0.2 mg (15%)
Riboflavin (Vit. B2)	0.11 mg (7%)
Niacin (Vit. B3)	0.7 mg (5%)
Pantothenic acid (B5)	0.596 mg (12%)
Vitamin B6	1.235 mg (95%)
Folate (Vit. B9)	3 μg (1%)
Vitamin C	31.2 mg (52%)
Calcium	181 mg (18%)
Iron	1.7 mg (14%)
Magnesium	25 mg (7%)
Phosphorus	153 mg (22%)
Potassium	401 mg (9%)
Sodium	17 mg (1%)
Zinc	1.16 mg (12%)
Manganese 1.672 mg
Selenium 14.2 μg
Percentages are relative to US recommendations for adults.

In in vitro studies, garlic has been found to have antibacterial, antiviral, and antifungal activity. However, these actions are less clear in vivo. Garlic is also claimed to help prevent heart disease (including atherosclerosis, high cholesterol, and high blood pressure) and cancer. Garlic is used to prevent certain types of cancer, including stomach and colon cancers. In fact, countries where garlic is consumed in higher amounts, because of traditional cuisine, have been found to have a lower prevalence of cancer.Animal studies, and some early investigational studies in humans, have suggested possible cardiovascular benefits of garlic. A Czech study found garlic supplementation reduced accumulation of cholesterol on the vascular walls of animals. Another study had similar results, with garlic supplementation significantly reducing aortic plaque deposits of cholesterol-fed rabbits Another study showed supplementation with garlic extract inhibited vascular calcification in human patients with high blood cholesterol The known vasodilative effect of garlic is possibly caused by catabolism of garlic-derived polysulfides to hydrogen sulfide in red blood cells (RBCs), a reaction that is dependent on reduced thiols in or on the RBC membrane. Hydrogen sulfide is an endogenous cardioprotective vascular cell-signaling molecule.
Although these studies showed protective vascular changes in garlic-fed subjects, a randomized clinical trial funded by the National Institutes of Health (NIH) in the United States and published in the Archives of Internal Medicine in 2007 found the consumption of garlic in any form did not reduce blood cholesterol levels in patients with moderately high baseline cholesterol levels.
According to the Heart.org, "despite decades of research suggesting that garlic can improve cholesterol profiles, a new NIH-funded trial found absolutely no effects of raw garlic or garlic supplements on LDL, HDL, or triglycerides... The findings underscore the hazards of meta-analyses made up of small, flawed studies and the value of rigorously studying popular herbal remedies". In an editorial regarding the initial report's findings, two physicians from Weill Cornell Medical College of Cornell University, pointed out that there may "be effects of garlic on atherosclerosis specifically that were not picked up in the study".
Allium sativum has been found to reduce platelet aggregation and hyperlipidemia.
In 2007, the BBC reported Allium sativum may have other beneficial properties, such as preventing and fighting the common cold. This assertion has the backing of long tradition in herbal medicine, which has used garlic for hoarseness and coughs. The Cherokee also used it as an expectorant for coughs and croup.
Garlic is also alleged to help regulate blood sugar levels. Regular and prolonged use of therapeutic amounts of aged garlic extracts lower blood homocysteine levels and has been shown to prevent some complications of diabetes mellitus. People taking insulin should not consume medicinal amounts of garlic without consulting a physician.
In 1858, Louis Pasteur observed garlic's antibacterial activity, and it was used as an antiseptic to prevent gangrene during World War I and World War II. More recently, it has been found from a clinical trial that a mouthwash containing 2.5% fresh garlic shows good antimicrobial activity, although the majority of the participants reported an unpleasant taste and halitosis.
Garlic cloves are used as a remedy for infections (especially chest problems), digestive disorders, and fungal infections such as thrush.
Garlic has been found to enhance thiamin absorption, and therefore reduces the likelihood for developing the thiamin deficiency beriberi.
In 1924, it was found to be an effective way to prevent scurvy, because of its high vitamin C content.
Garlic has been used reasonably successfully in AIDS patients to treat Cryptosporidium in an uncontrolled study in China. It has also been used by at least one AIDS patient to treat toxoplasmosis, another protozoal disease.
Garlic supplementation in rats, along with a high protein diet, has been shown to boost testosterone levels.
A 2010 double-blind, parallel, randomised, placebo-controlled trial, involving 50 patients whose routine clinical records in general practice documented treated but uncontrolled hypertension, concluded, "Our trial suggests that aged garlic extract is superior to placebo in lowering systolic blood pressure similarly to current first line medications in patients with treated but uncontrolled hypertension."

Other uses

The sticky juice within the bulb cloves is used as an adhesive in mending glass and porcelain in China.

Adverse effects and toxicology

Garlic is known for causing halitosis, as well as causing sweat to have a pungent 'garlicky' smell, which is caused by allyl methyl sulfide (AMS). AMS is a gas which is absorbed into the blood during the metabolism of garlic; from the blood it travels to the lungs (and from there to the mouth, causing bad breath) and skin, where it is exuded through skin pores. Washing the skin with soap is only a partial and imperfect solution to the smell. Studies have shown sipping milk at the same time as consuming garlic can significantly neutralize bad breath. Mixing garlic with milk in the mouth before swallowing reduced the odor better than drinking milk afterward. Plain water mushrooms and basil may also reduce the odor; the mix of fat and water found in milk, however, was the most effective.
Raw garlic is more potent; cooking garlic reduces the effect. The green, dry 'folds' in the center of the garlic clove are especially pungent. The sulfur compound allicin, produced by crushing or chewing fresh garlic, produces other sulfur compounds: ajoene, allyl sulfides, and vinyldithiins. Aged garlic lacks allicin, but may have some activity due to the presence of S-allylcysteine.
In a rat study, allicin, was found to be an activator of TRPA1. The neurons released neurotransmitters in the spinal cord to generate pain signals and released neuropeptides at the site of sensory nerve activation, resulting in vasodilation, as well as inflammation. Allicin is released only by cruching or chewing raw garlic and cannot be formed from cooked garlic.
Some people suffer from allergies to garlic and other plants in the allium family. Symptoms can include irritable bowel, diarrhea, mouth and throat ulcerations, nausea, breathing difficulties, and, in rare cases, anaphylaxis. Garlic-sensitive patients show positive tests to diallyl disulfide, allylpropyldisulfide, allylmercaptan and allicin, all of which are present in garlic. People who suffer from garlic allergies will often be sensitive to many plants in the lily family (Liliaceae), including onions, garlic, chives, leeks, shallots, garden lilies, ginger, and bananas.
Garlic can also cause indigestion, nausea, vomiting, and diarrhea. It thins the blood (as does aspirin); this had caused very high quantities of garlic and garlic supplements to be linked with an increased risk of bleeding, particularly during pregnancy and after surgery and childbirth, although culinary quantities are safe for consumption. Several reports of serious burns resulting from garlic being applied topically for various purposes, including naturopathic uses and acne treatment, indicate care must be taken for these uses, usually testing a small area of skin using a very low concentration of garlic.On the basis of numerous reports of such burns, including burns to children, topical use of raw garlic, as well as insertion of raw garlic into body cavities, is discouraged. In particular, topical application of raw garlic to young children is not advisable. The side effects of long-term garlic supplementation, if any exist, are largely unknown, and no FDA-approved study has been performed. However, garlic has been consumed for several thousand years without any adverse long-term effects, suggesting modest quantities of garlic pose, at worst, minimal risks to normal individuals. Possible side effects include gastrointestinal discomfort, sweating, dizziness, allergic reactions, bleeding, and menstrual irregularities. The safety of garlic supplements had not been determined for children.; some breastfeeding mothers have found their babies slow to feed and have noted a garlic odour coming from their baby when they have consumed garlic.
Garlic may interact with warfarin, antiplatelets, saquinavir, antihypertensives, calcium channel blockers, and hypoglycemic drugs, as well as other medications. Members of the alium family might be toxic to cats or dogs. Some degree of liver toxicity has been demonstrated in rats, particularly in extremely large quantities exceeding those that a rat would consume under normal situations.

Properties

When crushed, Allium sativum yields allicin, an antibiotic and antifungal compound (phytoncide). It has been claimed that it can be used as a home remedy to help speed recovery from strep throat or other minor ailments because of its antibiotic properties. It also contains the sulfur-containing compounds alliin, ajoene, diallylsulfide, dithiin, S-allylcysteine, and enzymes, B vitamins, proteins, minerals, saponins, flavonoids, and Maillard reaction products, which are not sulfur-containing compounds. Furthermore, a phytoalexin (allixin) was found, a nonsulfur compound with a γ-pyrone skeleton structure with antioxidant effects, antimicrobial effects, antitumor promoting effects, inhibition of aflatoxin B2 DNA binding, and neurotrophic effects. Allixin showed an antitumor promoting effect in vivo, inhibiting skin tumor formation by TPA and DMBA initiated mice. Analogs of this compound have exhibited antitumor promoting effects in in vitro experimental conditions. Herein, allixin and/or its analogs may be expected useful compounds for cancer prevention or chemotherapy agents for other diseases.
The composition of the bulbs is approximately 84.09% water, 13.38% organic matter, and 1.53% inorganic matter, while the leaves are 87.14% water, 11.27% organic matter, and 1.59% inorganic matter.
The phytochemicals responsible for the sharp flavor of garlic are produced when the plant's cells are damaged. When a cell is broken by chopping, chewing, or crushing, enzymes stored in cell vacuoles trigger the breakdown of several sulfur-containing compounds stored in the cell fluids. The resultant compounds are responsible for the sharp or hot taste and strong smell of garlic. Some of the compounds are unstable and continue to react over time. Among the members of the onion family, garlic has by far the highest concentrations of initial reaction products, making garlic much more potent than onions, shallots, or leeks. Although many humans enjoy the taste of garlic, these compounds are believed to have evolved as a defensive mechanism, deterring animals such as birds, insects, and worms from eating the plant.
A large number of sulfur compounds contribute to the smell and taste of garlic. Diallyl disulfide is believed to be an important odor component. Allicin has been found to be the compound most responsible for the "hot" sensation of raw garlic. This chemical opens thermotransient receptor potential channels that are responsible for the burning sense of heat in foods. The process of cooking garlic removes allicin, thus mellowing its spiciness.
Because of its strong odor, garlic is sometimes called the "stinking rose". When eaten in quantity, garlic may be strongly evident in the diner's sweat and breath the following day. This is because garlic's strong-smelling sulfur compounds are metabolized, forming allyl methyl sulfide. Allyl methyl sulfide (AMS) cannot be digested and is passed into the blood. It is carried to the lungs and the skin, where it is excreted. Since digestion takes several hours, and release of AMS several hours more, the effect of eating garlic may be present for a long time.
This well-known phenomenon of "garlic breath" is alleged to be alleviated by eating fresh parsley. The herb is, therefore, included in many garlic recipes, such as [[pistou]], persillade, and the garlic butter spread used in garlic bread. However, since the odour results mainly from digestive processes placing compounds such as AMS in the blood, and AMS is then released through the lungs over the course of many hours, eating parsley provides only a temporary masking. One way of accelerating the release of AMS from the body is the use of a sauna.
Because of the AMS in the bloodstream, it is believed by some to act as a mosquito repellent, but no clinically reported evidence suggests it is actually effective.

Spiritual and religious perceptions

Garlic has been regarded as a force for both good and evil. According to Cassell's Dictionary of Superstitions, there is an Islamic myth that considers that after Satan left the Garden of Eden, garlic arose in his left footprint and onion in the right. In Europe, many cultures have used garlic for protection or white magic, perhaps owing to its reputation as a potent preventative medicine. Central European folk beliefs considered garlic a powerful ward against demons, werewolves, and vampires. To ward off vampires, garlic could be worn, hung in windows, or rubbed on chimneys and keyholes.
In both Hinduism and Jainism, garlic is considered to stimulate and warm the body and to increase one's desires. Some devout Hindus generally avoid using garlic and the related onion in the preparation of foods for religious festivities and events. Followers of the Jain religion avoid eating garlic and onion on a daily basis.
In connection with the odor associated with garlic, Islam views eating garlic and subsequently going to the mosque as inappropriate because the smell from the mouth will irritate the fellow worshippers.
The irrational fear of garlic is alliumphobia.

Date Palm and Varieties of Date fruits

Date Palm and fruits
The date palm (Phoenix dactylifera) is a palm in the genus Phoenix, cultivated for its edible sweet fruit. Although its place of origin is unknown because of long cultivation, it probably originated from lands around the Persian Gulf. It is a medium-sized plant, 15–25 m tall, growing singly or forming a clump with several stems from a single root system. The leaves are 3–5 m long, with spines on the petiole, and pinnate, with about 150 leaflets; the leaflets are 30 cm long and 2 cm wide. The full span of the crown ranges from 6 to 10 m.

Etymology

The species name dactylifera "date-bearing" comes from Ancient Greek dáktulos "date" (also "finger") and the stem of the Latin verb ferō "I bear"

History of dates

Dates have been a staple food of the Middle East for thousands of years. They are believed to have originated around the Persian Gulf, and have been cultivated since ancient times from Mesopotamia to prehistoric Egypt, possibly as early as 4000 BCE. The Ancient Egyptians used the fruits to be made into date wine, and ate them at harvest. There is archaeological evidence of date cultivation in eastern Arabia in 6000 BCE. (Alvarez-Mon 2006).
In later times, traders spread dates around South and South West Asia, northern Africa, and Spain and Italy. Dates were introduced into Mexico and California by the Spaniards by 1765, around Mission San Ignacio.
A date palm cultivar, known as Judean date palm is renowned for its long-lived orthodox seed, which successfully sprouted after accidental storage for 2000 years. This particular

seed is presently reputed to be the oldest viable seed but the upper survival time limit of properly stored seeds remains unknown.

Dried dates (edible parts)
Nutritional value per 100 g (3.5 oz)
Energy	1,180 kJ (280 kcal)
Carbohydrates	75 g
- Sugars	63 g
- Dietary fibre	8 g
Fat	0.4 g
Protein	2.5 g
Water	21 g
Vitamin C	0.4 mg (1%)
Manganese	0.262 mg
Percentages are relative to US recommendations for adults. Source: USDA Nutrient database

Dates
The fruit is known as a date.^[6] The fruit's English name, as well as the Latin species name dactylifera, both come from the Greek word for "finger," dáktulos, because of the fruit's elongated shape. Dates are oval-cylindrical, 3–7 cm long, and 2–3 cm diameter, and when unripe, range from bright red to bright yellow in colour, depending on variety. Dates contain a single seed about 2–2.5 cm long and 6–8 mm thick. Three main cultivar groups of date exist: soft (e.g. 'Barhee', 'Halawy', 'Khadrawy', 'Medjool'), semi-dry (e.g. 'Dayri', 'Deglet Noor', 'Zahidi'), and dry (e.g. 'Thoory'). The type of fruit depends on the glucose, fructose and sucrose content.
The date palm is dioecious, having separate male and female plants. They can be easily grown from seed, but only 50% of seedlings will be female and hence fruit bearing, and dates from seedling plants are often smaller and of poorer quality. Most commercial plantations thus use cuttings of heavily cropping cultivars, mainly 'Medjool' as this cultivar produces particularly high yields of large, sweet fruit. Plants grown from cuttings will fruit 2–3 years earlier than seedling plants.
Dates are naturally wind pollinated but in both traditional oasis horticulture and in the modern commercial orchards they are entirely pollinated manually. Natural pollination occurs with about an equal number of male and female plants. However, with assistance, one male can pollinate up to 100 females. Since the males are of value only as pollinators, this allows the growers to use their resources for many more fruit producing female plants. Some growers do not even maintain any male plants as male flowers become available at local markets at pollination time. Manual pollination is done by skilled labourers on ladders. In some areas such as Iraq the pollinator climbs the tree using a special climbing tool that wraps around the tree trunk and the climber's back to keep him attached to the trunk while climbing. Less often the pollen may be blown onto the female flowers by a wind machine.
Parthenocarpic cultivars are available but the seedless fruit is smaller and of lower quality.
Dates ripen in four stages, which are known throughout the world by their Arabic names kimri (unripe), khalal (full-size, crunchy), rutab (ripe, soft), tamr (ripe, sun-dried). A 100 gram portion of fresh dates is a source of vitamin and supplies 230 kcal (960 of energy. Since dates contain relatively little water, they do not become much more concentrated upon drying, although the vitamin C is lost in the process.
Dates are an important traditional crop in Turkey, Iraq, Arabia, and north Africa west to Morocco and are mentioned more than 50 times in the Bible. In Islamic countries, dates and yogurt or milk are a traditional first meal when the sun sets during Ramadan. Dates (especially Medjool and Deglet Noor) are also cultivated in southern California, Arizona and southern Florida in the United States.
Date palms can take 4 to 7 years after planting before they will bear fruit, and produce viable yields for commercial harvest between 7 to 10 years. Mature date palms can produce 80–120 kilograms (176–264) of dates per harvest season, although they do not all ripen at the same time so several harvests are required. In order to get fruit of marketable quality, the bunches of dates must be thinned and bagged or covered before ripening so that the remaining fruits grow larger and are protected from weather and pests such as birds.

Cultivars of dates

A large number of date cultivars are grown. The most important are:

• Aabel — common in Libya.
• Ajwah — from the town of Medina in Saudi Arabia, it is the subject of a famous Hadith of the Prophet Muhammad.
• Al-Barakah — from Saudi Arabia.
• Amir Hajj or 'Amer Hajj' — from Iraq, these are soft with a thin skin and thick flesh, sometimes called "the visitor's date" because it is a delicacy served to guests.
• 'Abid Rahim (Arabic: عبد رحيم‎), from Sudan.
• Barakawi (Arabic: بركاوي‎), from Sudan.
• Barhee or (barhi) (from Arabic barh, a hot wind) — these are nearly cylindrical, light amber to dark brown when ripe; soft, with thick flesh and rich flavour. One of the few varieties that are good in the khalal stage when they are yellow (like a fresh grape as opposed to dry, like a raisin).
• Bireir (Arabic: برير‎) — from Sudan.
• Datça Date - Turkey, this spice is the northernmost population of dates, in Mediterranean.
• Deglet Noor (Arabic: دڤلة النور 'date of light') — so named because the centre appears light or golden when held up to the sun. This is a leading date in Libya, Algeria, the USA, and Tunisia, and in the latter country it is grown in inland oases and is the chief export cultivar. It is semi-dry and not very sweet.
• Derrie or 'Dayri' (the 'Monastery' date) — from southern Iraq — these are long, slender, nearly black, and soft.
• Empress — developed by the DaVall Family in Indio California USA from a seedling of 'Thoory'. It is large, and is softer and sweeter than 'Thoory'. It generally has a light tan top half and brown bottom half.
• Ftimi or 'Alligue' — these are grown in inland oases of Tunisia.
• Holwah (Halawi) (Arabic: 'sweet') — these are soft, and extremely sweet, small to medium in size.
• Haleema — in Hoon, Libya (Haleema is a woman's name).
• Hayany — from Egypt (Hayani) (Hayany is a man's name) — these dates are dark-red to nearly black and soft.
• Iteema — common in Algeria.
• Khajur — common in India / Pakistan.
• Kenta — common in Tunisia.

• Khadrawy (Arabic: 'green') — a cultivar favoured by many Arabs, it is a soft, very dark date.
• Khalasah (Arabic: 'quintessence') — one of the most famous palm cultivars in Saudi Arabia, famous for its sweetness level that is not high nor low, thus, suits most people. Its fruit is called 'Khlas'. Its famous place is 'Huffuf' (Al-Ahsa) and 'Qatif' in the Eastern Province of Saudi Arabia (Al-Sharqheyah).
• Khastawi (Khusatawi, Kustawy) — this is the leading soft date in Iraq; it is syrupy and small in size, prized for dessert.
• Maktoom (Arabic: 'hidden') — this is a large, red-brown, thick-skinned, soft, medium-sweet date.
• Manakbir — a large fruit that ripens early.
• Medjool or (Mujhoolah) (Arabic: 'unknown') — from Morocco, also grown in the USA, Saudi Arabia, Jordan, the Palestinian territories and Israel; a large, sweet and succulent date.

• Migraf (Mejraf) — very popular in Southern Yemen, these are large, golden-amber dates.
• Mgmaget Ayuob — from Hoon, Libya.
• Mishriq (Arabic: 'East' — مشرق)‎ — from Sudan and Saudi Arabia.
• Mozafati — from Iran, where it is mainly grown in Kerman province, and often named "Bam (Mozafati) dates", after a city in that province. It is a dark, soft and sweet date of medium size. It is exceptionally well-suited for fresh consumption, because of its long shelf life. At a temperature of −5 degrees Celsius (23 °F) it can be kept for up to 2 years. It accounts for 10% of total Iranian date crop. (100,000 tons, of which 30% is exported).
• Nabtat-seyf — in Saudi Arabia.
• Rotab — from Iran, they are dark and soft.
• Sag‘ai — from Saudi Arabia.
• Saidy (Saidi) — soft, very sweet, these are popular in Libya.
• Sayer (Sayir) (Arabic: 'common') — these dates are dark orange-brown, of medium size, soft and syrupy.
• Sekkeri — (lit. sugary) (Arabic: سكري) Dark brown skin; distinctly sweet and soft flesh, from Saudi Arabia, it is the most expensive kind.
• Sellaj — (Arabic: سلّج)in Saudi Arabia.
• Tagyat — common in Libya.
• Tamej — in Libya.
• Thoory (Thuri) — popular in Algeria, this dry date is brown-red when cured with a bluish bloom and very wrinkled skin. Its flesh is sometimes hard and brittle but the flavour described as sweet and nutty.
• Umeljwary — in Libya.
• Umelkhashab — Brilliant red skin; bittersweet, hard white flesh (Saudi Arabia).
• Zahidi (Arabic: '[Of the] ascetic') — these medium size, cylindrical, light golden-brown semi-dry dates are very sugary, and sold as soft, medium-hard and hard.
• Zaghloul (Arabic: زغلول‎) -Dark red skin, long, and very crunchy when served fresh (as they invariably are), their sugar content is so high that it desiccates the mouth. The variety is essentially exclusive to Egypt, where it is subject to an element of nationalist sentiment (Saad Zaghloul being a major Egyptian national hero).

The Gaza Strip, especially Dier al Balah, "Village of Dates", is known for its exceptionally sweet red dates. There are more than 100 known cultivars in Iraq.  It should be noted, however, that a cultivar can have several names depending on the locality.

Production

Top Ten Dates Producers — 2007 (1000 tonnes)
Egypt	1,313.69
Iran	1,000.00
Saudi Arabia	982.54
United Arab Emirates	755.00
Pakistan	557.52
Algeria	526.92
Iraq	440.00
Sudan	332.00
Oman	255.87
Libya	175.00
World Total	6908.90
Source: UN Food & Agriculture Organisation (FAO)

Food uses

Dry or soft dates are eaten out-of-hand, or may be pitted and stuffed with fillings such as almonds, walnuts, candied orange and lemon peel, tahini, marzipan or cream cheese. Pitted dates are also referred to as stoned dates. Partially dried pitted dates may be glazed with glucose syrup for use as a snack food. Dates can also be chopped and used in a range of sweet and savory dishes, from tajines (tagines) in Morocco to puddings, ka'ak (types of Arab cookies) and other dessert items. Date nut bread, a type of cake, is very popular in the United States, especially around holidays. Dates are also processed into cubes, paste called "'ajwa", spread, date syrup or "honey" called "dibs" or "rub" in Libya, powder (date sugar), vinegar or alcohol. Recent innovations include chocolate-covered dates and products such as sparkling date juice, used in some Islamic countries as a non-alcoholic version of champagne, for special occasions and religious times such as Ramadan.
Dates can also be dehydrated, ground and mixed with grain to form a nutritious stockfeed. Dried dates are fed to camels, horses and dogs in the Sahara. In northern Nigeria, dates and peppers added to the native beer are believed to make it less intoxicating.
Young date leaves are cooked and eaten as a vegetable, as is the terminal bud or heart, though its removal kills the palm. The finely ground seeds are mixed with flour to make bread in times of scarcity. The flowers of the date palm are also edible. Traditionally the female flowers are the most available for sale and weigh 300–400 grams. The flower buds are used in salad or ground with dried fish to make a condiment for bread.
According to a study by Al-Shahib and Marshall, in many ways, "dates may be considered as an almost ideal food, providing a wide range of essential nutrients and potential health benefits." Dates are a very good source of dietary potassium. The sugar content of ripe dates is about 80%; the remainder consists of protein, fiber, and trace elements including boron, cobalt, copper, fluorine, magnesium, manganese, selenium, and zinc.
In India and Pakistan, North Africa, Ghana, and Côte d'Ivoire, date palms are tapped for the sweet sap, which is converted into palm sugar (known as jaggery or gur), molasses or alcoholic beverages. In North Africa the sap obtained from tapping palm trees is known as lāgbī (pronounced [laːɡbiː]). If left for a sufficient period of time (typically hours, depending on the temperature) lāgbī easily becomes an alcoholic drink. Special skill is required when tapping the palm tree so that it does not die.
In Southeast Spain (where a large date plantation exists including UNESCO protected Palmeral of Elche) dates (usually pitted with fried almond) are served wrapped in bacon and shallow fried.
It is also used to make Jallab.

Cultural reference

Represents the provincial tree of Balochistan (Pakistan).

Other uses of the plant

Date seeds are soaked and ground up for animal feed. Their oil is suitable for use in soap and cosmetics. They can also be processed chemically as a source of oxalic acid. The seeds are also burned to make charcoal for silversmiths, and can be strung in necklaces. Date seeds are also ground and used in the manner of coffee beans, or as an additive to coffee.
Stripped fruit clusters are used as brooms. In Pakistan, a viscous, thick syrup made from the ripe fruits is used as a coating for leather bags and pipes to prevent leaking.
Date palm sap is used to make palm syrup and numerous edible products derived from the syrup.
Date palm leaves are used for Palm Sunday in the Christian religion. In North Africa, they are commonly used for making huts. Mature leaves are also made into mats, screens, baskets and fans. Processed leaves can be used for insulating board. Dried leaf petioles are a source of cellulose pulp, used for walking sticks, brooms, fishing floats and fuel. Leaf sheaths are prized for their scent, and fibre from them is also used for rope, coarse cloth, and large hats. The leaves are also used as a lulav in the Jewish holiday of Sukkot.
Date palm wood is used for posts and rafters for huts; it is lighter than coconut and not very durable. It is also used for construction such as bridges and aqueducts, and parts of dhows. Leftover wood is burnt for fuel.
Where craft traditions still thrive, such as in Oman, the palm tree is the most versatile of all indigenous plants, and virtually every part of the tree is utilized to make functional items ranging from rope and baskets to beehives, fishing boats, and traditional dwellings.

Traditional medicinal uses

Dates have a high tannin content and are used medicinally as a detersive (having cleansing power) and astringent in intestinal troubles.  As an infusion, decoction, syrup, or paste, dates may be administered for sore throat, colds, bronchial catarrh, and taken to relieve fever and a number of other complaints.  One traditional belief is that it can counteract alcohol intoxication. The seed powder is also used in some traditional medicines. It is said that if dates are consumed with cucumber one can easily come out from the problem of over-slimming. Because of its laxative quality, dates are considered to be good at preventing constipation.
A gum that exudes from the wounded trunk is employed in India for treating diarrhea and genito-urinary ailments. The roots are used against toothache. The pollen yields an estrogenic principle, estrone, and has a gonadotropic effect on young rats.

Diseases

Date Palms are susceptible to a disease called Bayoud disease, which is caused by the fungus Fusarium oxysporum. This disease, which kills many of the popular older cultivars like 'Deglet Noor', has led to a major decline in production where it is present, notably Morocco and western Algeria. However, new cultivars resistant to the disease are being developed.

Date palm genome

In 2009, a team of researchers at the Weill Cornell Medical College in Qatar published a draft version of the date palm genome (Khalas variety).