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Pressed neem oil. Neem oil, also known as margosa oil, is a vegetable oil pressed from the fruits and seeds of the neem (Azadirachta indica), a tree which is indigenous to the Indian subcontinent and has been introduced to many other areas in the tropics.
Azadirachta indica, commonly known as neem, margosa, nimtree or Indian lilac, [3] is a tree in the mahogany family Meliaceae. It is one of the two species in the genus Azadirachta . It is native to the Indian subcontinent and to parts of Southeast Asia , but is naturalized and grown around the world in tropical and subtropical areas.
Azadirachtin interferes with a wide variety of insect pathways. [15]The substance acts as an insect growth regulator.It antagonizes both ecdysteroid (mainly 20E) and juvenile hormone activities by reducing secretion of prothoracicotropic hormone (PTTH) and allatotropins from the corpus cardiacum complex.
Azadiradione is the principal active ingredient in neem oil, which is extracted from the seeds of the neem tree.Smaller quantities of azadiradione can also be found in other plants like Cedrela odorata (Spanish cedar), Chisocheton siamensis, Xylocarpus granatum (cannonball mangrove) and Azalea indica (common azalea).
Azadirachta is a genus of two species of trees in the mahogany family Meliaceae. [2] Numerous species have been proposed for the genus but only two are currently recognized, Azadirachta excelsa and the economically important tree Azadirachta indica , the neem tree, from which neem oil is extracted.
Neem has demonstrated considerable potential as a fertilizer. For this purpose, neem cake and neem leaves are especially promising. Puri (1999), in his book Neem : The Divine Tree Azadirachta, [1] has given details about neem seed cake as manure and nitrification inhibitor. The author has described that, after processing, neem cake can be used ...
Neem gum is a natural extracted from Neem tree by induced or natural injury. Neem gum is clear, bright and amber-coloured material [1] non-bitter in taste and is soluble in cold water.
Azadirachta indica [5] is the most notable source of gedunin, but it has also been found in the following plants: Cedrela fissilis [6] Cedrela odorata [7] [8] Cedrela salvadorensis [9] Entandrophragma angolense [10] Khaya grandifoliola [11] Melia azedarach [12] Toona sinensis [13] [14] Xylocarpus granatum [15] [16]