Kanagaratnam, P.Pethiyagoda, U.Velu, M.S.2013-06-142013-06-141983COCOS - Journal of the Coconut Research Institute of Sri Lanka1pp.7-10https://dl-cri.nsf.gov.lk/handle/1/676AgricultureCoconutsInsect pestsCoconut caterpillarOpisina arenosellaBiological controlBacillus thuringiensisPlant protectionEffect of four commercial preparations of Bacillus thuringiensis on Opisina arenosella WalkerA