Laboratory screening of green pesticides for controlling of turf pest Prodenia litura

To screen green pesticides for the management of Prodenia litura, laboratory efficacies of 20 green pesticides belonging to five different chemistries were evaluated on the 3rd instar larvae of P.litura using leafdip method. Results showed that efficacies of seven pyrethroids (lambdacyhalothrin, cyfluthrin, bifenthrin, betacypermethrin, cypermethrin, fenvalerate and fenpropathrin) commonly used in agriculture were lower than that of conventional organophosphorus insecticide chlorpyrifos, two novel pyrethroids (transfluthrin and tetramethylfluthrin, mainly used in vector control) had higher or equal activity compared with chlorpyrifos. Lufenuron, chlorfluazuron, hexaflumuron, tebufenozide, indoxacarb, chlorfenapyr and emamectin benzoate were the seven most effective to P.litura in laboratory among twenty tested green pesticides. Belonging to five different modes of action, these seven insecticides can be used as green pesticide candidates for the control of turf insect pest P.litura and served to be further studied in field.