Book on Neem Natural Crop Protection in the Tropics by Gaby Stoll (1988) contains useful information on neem as an organic pesticide. You can order the book from UNIPUB 4511-F Assembly Drive Lanham, MD 20705-4391 tel: (301) 459-4391 The book costs US$25 Hope this is useful. Karen Westley International Ag-Sieve Rodale Institute