Seasonal Incidence of Major Insect Pests in Maize Crop (Zea mays L.) Under Chhattisgarh Plains

The seasonal incidence of the major insect pests of maize crop was investigated during Kharif season 2014–15 at the experimental field of research cum instructional farm, I.G.K.V., Raipur, Chhattisgarh, India to find out seasonal incidence of major insect pests in maize crop (Zea mays L.) under Chhattisgarh plains. Results revealed that the incidence of Pink stem borer (Sesamia inferens), green stink bug (Nezara viridula), leaf hopper (Cicadulina spp.), black aphid (Rhopalosiphum maidis) and cob borer (Helicoverpa armigera) were appeared on the maize crop during crop growing period. The higher number of pin holes(24 plant⁻¹) and percentage of deadhearts (60%) of pink stem borer were recorded during the second week of September and fourth week of September as compare to other months, respectively. The peak population mean of black aphid (30 plant⁻¹) was recorded in the third week of September, while the green sting bug (1.80 plant⁻¹) attained their highest in second week of September and the highest population mean of cob borer was recorded during the fourth week October.