Neem (Azadirachta indica a. Juss) is a monumental tree of Meliaceae family coming from the Indian Indian subcontinent. Actually, the importance and distribution of neem is increasing all over the World due to its beneficial properties, as reported by the WHO/UNEP1989 [7]. Neem is considered an effective source of environmentally powerful natural pesticides and considered to be one of the most promising trees of the 21st century for its great potential in pest management, environmental protection and medicine. The International Scientific Community included the neem tree in the top ten list of plants to be studied and used for the sustainable development of the planet and the health of living beings. Various derivatives of neem have showed relevant uses in the toiletries and pharmaceuticals markets, the manufacture of agricultural implements and furniture, cattle and poultry feeds, and nitrification of soils for various agricultural crops [8.9]. The multipurpose character of neem is directly derived from its complex chemical composition, subjected to high variability, also reflected into the composition of derived products. Among the many products obtained from the seeds, neem oil is the most commercially relevant.
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