What are chemical components of Neem plant which makes it insecticidal?

Question

Please, i really need an answer. The information will be used on our research project and it will be very helpul for me and my groupmates. TY

Answer 1

Neem or Azadirachta Indica is a large, evergreen tree and has strong health maintaining properties. It has been used as a tonic and astringent that promotes wound healing. Neem's traditional use is based on its detoxifying benefits that help maintain healthy circulatory, digestive, respiratory and urinary systems. It is used for external applications in skin diseases. Neem extracts possess antidiabetic, antibacterial, and antiviral properties. Its principle constituents are nimbin, nimbinin and nimbidin. All parts of the plant yield b-sitosterol.

http://www.herbalprovider.com/neem.html

Answer 2

Insecticidal chemical components of Neem tree:

Azadirachtin, salannin, meliantriol, and nimbin

http://www.colostate.edu/Depts/Entomolog...

and a new tetranortriterpenoid, meliatetraolenone

http://cat.inist.fr/?aModele=afficheN&cp...