NEEM OIL is a natural pesticide extracted from the seeds of Neem (Azadirachta indica), a tropical tree native to the Indian subcontinent. All parts of the tree have an antimicrobial and insecticidal property that has been exploited for thousands of years by indigenous people. Its excellent safety profile for higher organisms, especially birds and mammals, makes it a better alternative to chemical pesticides.
NEEM OIL is not a contact poison. It does not kill insect pests directly. It is systemic in action, mainly affecting the feeding as well as growth and development of insects. Nothing will happen immediately even if you spray the oil on insects directly, so people often come to the conclusion that neem oil is ineffective. However once ingested by insects, Neem oil causes insects to reduce or cease feeding, can prevent larvae from maturing, reduces or interrupts mating behavior and, in some cases, the oil coats the breathing holes of insects and kills them.