Bioefficacy of ethiprole 40 + Imidacloprid 40 (Glamore 80WG) against bihar hairy caterpillar, Spilarctia obliqua (walker) Devi N.I.*, Srivastava R.P. Insecticide Toxicology Laboratory Department of Entomology, College of Agriculture, GB Pant University of Agriculture and Technology, Pantnagar-263145 *Email: nidevi933@gmail.com
Online published on 27 July, 2018. Abstract Bioefficacy of ethiprole 40+ imidacloprid 40 (Glamore 80WG) against 14d old larvae of Spilosoma obliqua (Walker) by leaf dip method revealed a feeding inhibition of 87.60 and 81.86% @0.833 and 0.666% at 24HAF (hours after feeding) as compared to control, respectively. The LC50 values against 9d old larvae at 2.5, 3.0, 3.5, 4.0 and 5.0 days after feeding (DAF) were 1.018, 0.802, 0.606, 0.464 and 0.334%; and against 14d old larvae at 4.0 and 5.0 DAF were 0.628 and 0.563%, respectively. The LT50 values against 9d old larvae were 51.08, 81.90 and 96.85 hr @0.833, 0.666 and 0.499%, respectively. The values against 9d old larvae in atomization method at 3, 4 and 5 DAE (days after exposure) were LC50 0.466, 0.369 and 0.324%, respectively; and against 5d old larvae it was observed to be 0.293 and 0.130% at 3 and 4 DAE, respectively. With the topical exposure method, it neither showed morbidity nor mortality up to 4 DAE to the five doses (4.15 to 20.82μg/larva) against 14d old larvae. Top Keywords Spilarctia obliqua, Glamore 80WG, bioassay, leaf dip method, atomization method, topical application, feeding inhibition. Top |