The Neem tree (Azadirachta indica) is known for its insecticidal properties. All parts of this tree, but especially the grains, contain active ingredients which can be used as insecticide. The most important active ingredient in Neem products is Azadirachtin. This active ingredient has been registered for use as an insecticide in Thailand.
Neem extracts are found to be active against a big number of pests, including the African bollworm (Helicoverpa armigera), Diamond-back moth (Plutella xylostella), thrips and aphids. Neem leaves are used in the protection of stored beans. Neem cake is used as a manure and to control nematodes.
Neem products are very promising to be used in IPM as botanical insecticides, as repellents, as anti-feedant or as oviposition deterrent. They have the advantage of a relatively low toxicity and they break down rapidly under the influence of sunlight. While commercial Neem products are available, extracts which are produced by the farmers are often found to be effective and can be made free of cost.
Several commercial Neem products are available in Thailand, for example at Thai Neem Products Co., Ltd.
