Neem based insecticides and fungicides Neem tree i.e. Azadirachta indica is known in India and neighboring countries for more than 2,000 years. A related species with similar properties grows in Thailand where in villages the beneficial properties of neem were appreciated for a long time. In 1959, Dr. Heinrich Schmutterer, a young German scientist trained in entomology and plant pathology, worked in Sudan during a locust invasion.
