Seasonal Incidence of Whitefly Bemisia tabaci (Genn.) on Mungbean

Abstract

This study on the seasonal incidence of whitefly Bemisia tabaci (Gennadius) on mungbean was done during kharif, 2014. Weekly observations on incidence were made on five randomly selected tagged plants. The results revealed that the first incidence was observed during 22nd standard meteorological week (SMW)- 66.67 whitefly/plant. This reached at its peak (89.67 whitefly/plant) during the 34th SMW. Correlation coefficients between incidence and weather factors revealed that maximum temperature had a positive relationship (r = 0.51) while the minimum temperature and relative humidity- RH (morning) revealed a negative one (r = -0.03 and r = -0.52); and RH (evening) and rainfall showed a highly significant but negative correlation.