Population Dynamics of Thrips on Chilly, Bottle Guard and Cucumber Under Different Biochemical Agents

Abstract

Thrips tabaci is a polyphagous pest that destroys agricultural and other economically significant crop plants. T. tabaci scrapes its mouth parts on fragile crop sections and feeds on flowing sap, resulting in white / brown spots / stricks on leaves / flowers and fruits, affecting plant development and fruit quality. Considering the above facts experiments were conducted to study the population dynamics of T. tabaci pests that infest chilly, bottle gourd, and cucumber. The sessional incidence of thrips on chilly, bottle gourd, and cucumber were commenced in the second week of August and continued until the fourth week of November. The incidence was outbreak in the second and third weeks of September. Maximum outbreak of thrips population was noticed in third, fourth week of September and first and second week of October. Foliar application of G3 mixture, Azadirachta indica oil Spray, Calotropis procera leaf extract Nicotiana tabucum extract, Tagetes erecta leaf extract, and Imidacloprid 17.8% SL showed reduction in insect outbreak. Maximum pest population was observed in control condition (no treatment given), followed by CLE (Calotropis procera leaf extract), TLE (Tagetes erecta leaf extract), G3M (G3 Mixture) and AIO (Azadirachta indica oil Spray). There was a steady decline in the population in NS (Nicotiana tabucum extract) and finally Imida (Imidacloprid 17.8% SL) had minimal population outbreaks.