Field studies conducted during 2020-21 rabi and 2021-22 kharif season to know population fluctuation of sunflower insect pests and their natural enemies revealed that thrips and lepidopteran pests (Helicoverpa armigera, Spodoptera litura and Spilarctina oblique) were the major pests during kharif and Sucking pests (leafhopper and whiteflies) were major insect pests during rabi season. Lady bird beetles, Chrysoperla and spiders were recorded as major predators throughout season. Weather parameters played an important role on the incidence of pests as revealed by Correlation and regression studies.

Insect pests, Natural enemies, Population dynamics, Sunflower, correlation and regression

Weather variables act as a limiting factor for the insect pest development. Pest population build up was significantly influenced by weather variables in Sunflower. Though empirical models are very useful in better understanding of pest and its dynamics, local weather conditions influence population dynamics of pest greatly and hence behave in a location-specific manner and thus they are influenced by different weather factors at different locations. Pest weather regression models would be useful in forecasting the likely pest build up, thereby helping in forewarning and timely management. Such information may be used for recommending required zone-wise management strategies.

Vijaykumar N. Ghante, Poornima, Vikas V. Kulkarni and Umesh M.R. (2022). Present Status of Sunflower Pests and their Natural Enemies in North Karnataka. Biological Forum – An International Journal, 14(4a): 220-224.