07-09-2017, 11:29 AM
Toxicity at the baseline of fungicides viz. mancozeb, propaconazole, carbendazim, azoxystrobin and ridomil MZ and insecticides namely. spinosad 45SC, lufenuron 5EC, flubendiamide 48 EC and acetamiprid 20 SP against Spodoptera litura. The LC50 values showed that flubendamide was more toxic against S. litura than all chemicals. The order of toxicity was flubendiamide (8,37)> acetamipyrid (9,58)> spinosad (23,22)> lufenuron (23,46)> propaconazole (90,98)> carbendazim (413,51)> azoxystrobion (597 , 77)> mancozeb (681.39)> ridomil (1193.00). LT50 values showed that flubendamide was more toxic while azoxystrobium was found to be less toxic against S. litura. The order of toxicity was flubendiamide (39.00)> acetamipyride (44.00)> spinosad (68.00)> propaconazole (108.00)> carbendazim (112.00)> lufenuron (120.00) = Ridomil , 00)> mancozeb (148.00)> azoxystrobin (192.00). The response capacity of S. litura larvae provides important information with dose and mortality time for the selection of insecticides in the field for better pest management. Information based on these results would help to avoid economic losses due to the concentration of the insecticide dose and also helps in better integration of insecticides and fungicides into the MIP and the MRI program for the control of major pests and pathogens.