Effect of weather parameters on seasonal incidence of pod borer complex in pigeonpea

Field experiments were conducted at CCS Haryana Agricultural University, Hisar during kharif season of 2013 and 2014 to determine the effect of weather parameters on the incidence of pod borer complex on early maturing pigeonpea varieties. The study revealed that the infestation of Helicoverpa armigera and Maruca vitrata started with the onset of bud initiation and reached its peak at flowering stage. The maximum H. armigera larval population (1.83 larvae plant-1) was recorded in 1st week of July sown crop, whereas, the maximum incidence of M. vitrata (21.17 webs plant-1) was recorded in 2nd week of July sown crop. The larval population of H. armigera was significantly and positively correlated with the maximum temperature, followed by minimum temperature.Incidence of M. vitrata was negatively correlated with evening relative humidity and wind speed which was significant at p  0.05 level of significance.