Population Dynamics of Insect Pests of French Bean Under Hill Zone of Karnataka

Studies on population dynamics of French bean revealed that, during the study period a total of 11 insect taxa and one non-insect taxa belonging to 7 orders and 9 families were recorded throughout the cropping period for two seasons. The peak incidence of thrips, Megaleurothrips sp. was noticed during the second week of November and third week of February. The peak incidence of Helicoverpa armigera was noticed during the third week of November and last week of March whereas, Maruca testulalis (Geyer) was noticed during the last week of December and last week of March. Further, the peak incidence of aphids, whitefly and leaf hopper were recorded in third week of November and second week of February; third week of November and last week of February; third week of November and March, respectively.