Population dynamics of major insect pests of sorghum in Marathwada region (Maharashtra)

The results revealed that incidence of shoot fly, Atherigona soccata eggs was observed from 1^st week of July (27^th MW) to 1^st week of August (32^nd MW) and egg laying was negative correlated with rainfall, morning and evening relative humidity. The correlation of shoot fly dead hearts with minimum temperature was positively significant. The dead hearts due to stem borer, Chilo partellus occurred from 3^rd week of August (33^rd MW) to 3^rd week of october (42^nd MW). the correlation studies indicated that the impact of rainfall and evening relative humidity were negative and Bright Sun Shine was positively significant with stem borer infestation in terms of dead hearts. the incidence of aphid, Rophalosiphum maidis rauged from 4^th week of August (34^th MW) and to (42^nd MW). The predators lady bird beetle and chrysopa were active from 35^th 42^nd MW.