author(s)
Subrata Chatterjee, Soumya Sarathi Kundu, Dhiren Chettri and Ajoy Kumar Mukhopadhyay

abstract
Brinjal is attacked by number of sucking insects and in our study we find four pests diversified into four different families of the order Hemiptera from the both May sown and July sown crop. The pests include whitefly, aphid, leaf hopper and mealy bug. For all the recorded pests their population was observed on weekly interval. In case of leaf hopper no significant correlation was observed in both the May and July sow crops, but highest leaf hopper population was recorded in 44^th and 49^th standard week (SW) respectively. Aphid population was observed highest in 35^th SW for May sown brinjal and for July sown brinjal the peak population was recorded on 51^st SW. Aphid was found to be negatively correlated with temperature when it is sown in July. The white fly population reached its peak in 35^th and 49^th SW respectively for May and July sown crops and found to be negatively correlated with temperature and rainfall. Finally, the mealy bug peak population was recorded at in 43^rd and 34^th SW respectively for May and July sown crop and mealy bugs are positively correlated with temperature and relative humidity.