AZADIRACHTIN is a terpinoid chemical !ound in Meliaceous trees (e.q. White Cedar) but especially concentrated in the seeds of the Neem tree (Azadirachta indica). After considerable research in India, En<~land, the U.S.A., Japan, Germany and Australia; plus three international conferences, it is generally considered that this molecule is our best hope !or a safe and selective insecticide !or the 1990 s and beyond. It acts specifically on the sensory receptors of insects and their allies and also on their neuro-hormonal system, effectively disrupting their behaviour, growth, moulting and reproduction. The several modes of action of azadirachtin make it much more difficult for insects to become resistant to it. Not one case of an azadirachtin resistant insect species is known.