Vol. 12, Issue 6 (2023)

Author(s):
Ashithosh Mohanan, Gajendra Chandrakar, Chetna Khandekar, Beerendra and SM Ali Humayun

Abstract:
Laboratory experiments were conducted in the Department of Entomology, College of Agriculture, and IGKV. Raipur, Chhattisgarh, during year 2020, to study the acute toxicity of six doses (0.2, 0.4, 0.6, 0.8, 1.0 and 1.2 ml/L) of spinetoram insecticides along with one control (distilled water) against third larval S. litura on cabbage. The results of the insecticidal action of spinetoram on S. litura after 24 hrs of exposure indicated that spinetoram at 1.20 ml/L caused maximum mortality (66.66%). LC50 value of spinetoram after 24 hrs exposure was 0.86 ml/L. The results of the insecticidal action of spinetoram on S. litura after 48hrs of exposure indicated that spinetoram at 1.20 ml/L caused maximum mortality 70.00% in year 2020. After probit analysis of data it was found that LC50 value of spinetoram after 48 hrs exposure was 0.76 ml/L in year 2020. The results of the insecticidal action on S. litura after 72hrs of exposure indicated that spinetoram at 1.20 ml/L caused maximum mortality 73.33% in year 2020. After probit analysis of data it was found that LC50 value of spinetoram after 72 hrs exposure was 0.62 ml/L in year 2020.