Seasonal incidence of insect pests of rice at Pajancoa and RI, Karaikal, U.T. of Puducherry

Abstract

The Seasonal incidence of insect pests of rice were studied with a light trap during Kharif 2019 and Rabi 2019-2020. The results exhibited that yellow stem borer, Scirpophaga incertulas was first observed during 28th meteorological standard week (0.14) and its activity gained momentum from August to November (Kharif 2019) and January to February (Rabi 2019-2020) and reached its highest peak during 43rd MSW (2.86) and green leafhopper, Nephotettix virescens commenced during 47th MSW (1.43) and populations reached its highest level during 1st MSW (4.86) and 4th MSW (5.29). Brown planthopper, Nilaparvata lugens occurred first during 50th MSW (0.29) and its major activity was observed during 1st MSW (2.29) and 3rd MSW (1.86). White leafhopper, Cofana spectra arrived first during 48th MSW (0.29) with highest peak of population during 3rd MSW (1.71) during Rabi 2019-2020.