Vol. 12, Issue 1 (2023)

Author(s):
Nihal P Kokode, Dr. HR Sawai, Pragati R Jawake and Akshay S Shinde

Abstract:
Investigations were carried out to assess the toxicity of certain insecticides: chlorantraniliprole 18.5 SC, profenofos 50 EC, cartap hydrochloride 50 SP, spiromesifen 22.9 SC, buprofezin 25 SC, flubendiamide 20% WG, azadirachtin 1500 ppm and lambda cyhalothrin 9.5% + thiamethoxam 12.6% ZC on various biological parameters of Trichogramma chilonis Ishii. To test the toxicity of these pesticides on the adult mortality of T. chilonis in the fictitious host eggs of Corcyra cephalonica Stainton, bioassay investigations were conducted in a laboratory environment. Result observed that the least mortality in increasing order of residual toxicity of insecticides were, Azadirachtin 1500 ppm < chlorantraniliprole 18.5 SC ≤ flubendiamide 20% WG < profenofos 50 EC < spiromesifen 22.9 SC < buprofezin 25 SC < lambda cyhalothrin 9.5% + Thiamethoxam 12.6% ZC < cartap hydrochloride 50 SP adult per cent mortality observed 25.33, 40.00, 44.00, 50.66, 52.00, 54.66, 86.66 and 100.00 respectively at 1^st day after treatment. However, at 5^th day the residual effect of various test insecticides with 20.00, 30.66, 30.66, 36.00, 38.66, 42.66, 73.33 and 93.33 adult per cent mortality respectively whereas at 10^th day the residual toxicity of an insecticides on adult mortality recorded with 13.33, 14.66, 17.33, 20.00, 20.00, 30.66, 58.66 and 78.66 per cent respectively. All of the insecticides used in the current experiment were classified by the IOBC as slightly persistent to all of the insecticides that demonstrated toxicity to varying degrees up to 10 days.