Neem is "Azadirachta indica" A. Juss (Meliaceae). I am mailing to you the 140-page report "Neem: A Tree For Solving Global Problems" (1992) from the National Research Council, National Academy Press, Washington, DC, plus some reprints from our lab. For additional information, contact Deepak Bhatnagar of our lab at dbhatnag at nola.srrc.usda.gov.