3rd Edition Of Plant Science and Molecular Biology World Conference 2026

Abstract

The rice weevil, Sitophilus oryzae is the most important and widely distributed throughout the world. It is one of the most notorious pest which cause heavy losses of stored grain both quantitatively and qualitatively throughout the world. The present study was designed to find out the effects of bio pesticide k-mite on the mortality of adult rice weevil, their progeny and repellency. The result showed that the highest mortality rate of S. oryzae adults using bio-pesticide (K-mite)at 15°C temperature was 40%, 76%, 94% in 3200ppm dose at 24H, 48H, 72H exposure periods respectively and the lowest was 2%, 10%, 23% in 50ppm doses at 24H, 48H and 72H exposure periods respectively. The result revealed that the highest mortality rate at 20°C temperature was 38%, 56%, 78% in 3200ppm dose at 24H, 48H, 72H exposure periods respectively and the lowest was 6%, 11%, 13% in 50ppm doses at 24H, 48H and 72H exposure periods respectively. The result noticed that the highest mortality rate at 25°C temperature was 45%, 67%, 82% in 3200ppm dose at 24H, 48H, 72H exposure periods respectively and the lowest was 3%, 6%, 10% in 50ppm doses at 24H, 48H and 72H exposure periods respectively. The result also showed that the highest mortality rate at 30°C temperature was 22%, 46% in 1600pp dose & 98% in 3200ppm dose at 24H, 48H, 72H exposure periods respectively and the lowest was12%, 33% in 50ppm doses at 24H, 48H and 72H exposure periods respectively. The repellent effect of bio-pesticide (k-mite) against the adult rice weevil S. oryzae, in R1, R3, R4 and R5 replications, 100% insects (Sitophilus oryzae) went to non-poisonous food. In R2 replication, 96% insects (S. oryzae) went to non-poisonous food and only 4% insects (S. oryzae) went to poisonous food.