2014-06-112014-06-111997https://dl-cri.nsf.gov.lk//handle/1/4044enBiopesticidesInsect antifedentsInsecticidesAzadirachta indicaNeemInsect antifedents, growth regulatory and insecticidal properties of tissue culture and plant extracts of neem (Azadirachta Indica A. Juss)ThesisMPhilWIC 1997University of Aberdeen, UK