Avocato

Páginas: 4 (836 palabras) Publicado: 13 de diciembre de 2012
Avocado

The avocado (Persea americana) is a tree native to Central Mexico, classified in the flowering plant family Lauraceae along with cinnamon, camphor and bay laurel. Avocado or alligator pearalso refers to the fruit (botanically a large berry that contains a single seed) of the tree.
Avocados are commercially valuable and are cultivated in tropical and Mediterranean climates throughoutthe world. They have a green-skinned, fleshy body that may be pear-shaped, egg-shaped, or spherical, and ripens after harvesting. Trees are partially self-pollinating and often are propagated throughgrafting to maintain a predictable quality and quantity of the fruit.

History
P. americana, or the avocado, originated in the state of Puebla, Mexico. The native, undomesticated variety is knownas a criollo, and is small, with dark black skin, and contains a large seed.The oldest evidence of avocado use was found in a cave located in Coxcatlán, Puebla, Mexico, that dates to around 10,000 BC.The avocado tree also has a long history of cultivation in Central and South America; a water jar shaped like an avocado, dating to AD 900, was discovered in the pre-Incan city of Chan Chan.[4] Theearliest known written account of the avocado in Europe is that of Martín Fernández de Enciso (c.1470–c.1528) in 1518 or 1519 in his book, Suma De Geographia Que Trata De Todas Las Partidas Y ProvinciasDel Mundo.The first written record in English of the use of the word 'avocado' was by Hans Sloane in a 1696 index of Jamaican plants. The plant was introduced to Indonesia in 1750, Brazil in 1809,the Levant in 1908, and South Africa and Australia in the late 19th century.

Diseases
The main and most important disease of P. American is the "root rot", caused by the fungus Phytophthoracinnamomi. This disease is present in almost all producing areas of the world. Current systems to control this condition include on the one hand to achieve a "genetic resistance" through the use of tolerant...
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