Vol. 10, Special Issue 10 (2021)

Author(s):
Ipsita Mishra, Subhalaxmi Roy and Bijoy Kumar Mishra

Abstract:
Laboratory experiment was conducted to study the biology of coccinelid predators of Odisha. About 17species of predatory coccinellids were identified from different crops; the most important being Coccinella septempunctata, Coccinella transversalis and Cheilomenes sexmaculata, Cryptolaemus montruzeiri, Brumoides suturalis and Scymnus coccivora in aphid and mealy bugs infested plants. The biological parameters indicated that C. montruzeiri was the largest and S. coccivora was the smallest among the Coccidophagous coccinellids. The grubs of all the predatory coccinellids were found to be most susceptible to the rising temperatures. Therefore, it was observed that total developmental period was highest in the month of November and lowest in the month of May for all species. Total larval period was 22.0+0.08 20.1+0.09 and 13.9+0.13 days in November and 9.2+0.11, 9.10+0.04 and 10.9+0.63 in the month of May in respect of C. montruzeiri, B. suturalis and S. coccivora respectively. The total developmental periods in respect of the three species were 27.3+0.64, 25.2+0.11 and 17.1+0.09 days in the month of November and 11.7+0.64, 10.4+0.64 and 12.3+0.61 days in the month of May respectively. Pre pupae and pupae were least affected by the fluctuation of temperature.