17
Apr
2009
Allium cepa L. - onion
Green Pharmacy | Flowers | Liliopsida
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Scientific name - Allium cepa L.

Popular names - akaakai, basal, onion, ceba, cebola, cebolla, ciboria, Cipolla, Hui Hui Ts'ung, Ku Kut, oignon de cuisine, onion, onyan, pulantic, pyaj, SAFA, seba, Z'Oignon, Zongnon, Zwiebel.

Distribution and Habitat - original central Asia, but was not found in the natural environment.

Description - herbaceous biennial, bulb white, gold, red or purple, 5-8 x 3.10 cm. Leaves persistent, 4-10, fistula, 30-100 x 3-20 mm. Umbela blossom persistent, erect, compact, rear obsolete, ovata, ± equal, leading to acute acuminata. Flowers small stars until campanulata, 3-7 mm tepale erect, white, yellow-green or purple, margins entire, top obtuse or acute, anther white, pollen white, pedicel 10-50 mm. Blooms in June-August. 2n = 16

Tolerante - moderate compared to acidic soils.

Requirements - prefer land with pH 7.5-7.8, fertile and well drained.

Onions are sensitive to fotoperioada, and long days promote leaf growth, which are directly related to the roots.

Management - is crop rotation indicated at 6 years.

Propagation - by seeds or bulbs, in a greenhouse in January or February, in the open field in April or May. The bulbs are planted at 10 cm depth and 23-25 cm between plants.

Pests and diseases - is susceptible to various diseases, Aspergillus, Botrytis. Pests are most commonly bite onions and tripsii. To prevent bites, onion is a spray of water and paraffin which is sprayed between rows.

Properties and Uses - bulbs are edible, have diuretic properties, combat intestinal fermentation, vermifuge, agents. Onion seeds germinateza best at temperatures of 18-27 ˚ C, but young plants prefer 16-21 ˚ C 10 ˚ C day and night.

Decoction of 3.10 g onions 100 ml water.

Externally, has emollient properties, infusion of 5-10 g onions 100 ml water are poultices, you can make and gargle.

Fresh onions, crushed hairs combat hair loss, fresh juice is very good against the stings of wasps and bees.

Epideriologice studies have shown that the combination of garlic and onions reduce the risk of cancer, particularly stomach and colon cancer. The studies were conducted on animals.

Myth, Legend and Folklore - onion is one of the oldest cultivated plants, in 5 000 BC

In ancient Greece, cepa eating in significant amounts.

References

Gary J. Kelloff, Ernest T. Hawk, Caroline C. Sigman - Cancer Chemoprevention - Humana Press, 2004

Nancy Bubel - TheNew Seed Starter's Handbook - Roda Books, 1988

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