Fig. 1

Mean number of insect population per vine observed at different date in Betel leaf. It was evident from the study that black fly population incidence was started from the month of January (3.2 adult/vine) and continued until the entire growing period of the crop. Population ranged from 3.2 to 22.7 and reached its peak 20.5/vine and 22.7/vine during the month of May and October, respectively