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The toxicological studies on new generation insecticide Chlorantriniliprole, Flubendiamide Imidacloprid in rearing performance of Mulberry silkworm, Bombyx mori L. was carried out to find out waiting period for pesticides widely used by the farmers in mulberry growing areas were identified and sprayed to mulberry at an interval of 10, 15, 20, 25, 30 and 40days and fed to silkworms. Extended total larval duration was recorded in batches of silkworms fed on leaves sprayed with at [chlorantriniliprole (T1)- 15days after spray(DAS) (3rd instar 86.90h, 4th instar 127.90h, 5th instar 231.75h ), flubendiamide (T2) -10DAS(3rd instar 86.15h, 4th instar 127.04, 5th instar 241.27h), imidacloprid (T3) -10DAS( 3rd 83.75h, 4th 113.50h, 5th 225.50h ) and it was minimum in the batches of silkworm in T5(water spray) (3rd 72.75h, 4th 95.96h, 193.57h. )]. Disease incidence, cocoon yield, and denier recorded was least in[T1-15DAS(6.66%, 21.75g, 0.60.) T2-10 DAS (6.50%, 22.40g, 1.26.) T3-10 DAS (6.40%, 33.75g, 1.83.)].The rearing parameters viz., recorded in case of flubendiamide at 40DAS treatment and imidacloprid at 25 DAS were on par with the treatments dichlorvos.

Key words: Bombyx mori, Mulberry, Silkworm, Disease, Chlorantriniliprole