ABSTRACT
This chapter focuses on the influence of weather on whiteflies. These insects are poikilothermic animals and their body temperature does not remain constant, unlike a human being. Therefore, the whiteflies are bound to be influenced by the changing weather. This chapter reviews the studies were carried out to view the role of weather parameters such as temperature (maximum and minimum), relative humidity(morning and evening), rainfall, wind speed and sunshine, in affecting the whitefly population. The influence of weather on species such as Bemisiatabaci, Trialeurodesvaporariorum, and Trialeurodesricini has been examined. There is a negative correlation between maximum temperature(-0.562*) and the population of whiteflies, a positive correlation between minimum temperature(0.671** ) and the whitefly population, and a positive correlation between the whitefly population and relative humidity. The negative correlation(-0.641**) between the whitefly population and sunshine has also been mentioned. This chapter also discusses how changing weather, particularly the mild winter, is instrumental in causing the outbreak of whitefly.
