Observations on the host preferences and biology of Thrips flavus Schrank (Thysanoptera: Thripidae) from Dehra Dun, India.
In laboratory and field studies in Uttar Pradesh, India, Thrips flavus was collected from 78 food-plants in 26 families; 57 of the food-plants were new records. Food-plant preferences are reported in terms of the numbers of thrips found on samples of plants. Thrips damage appeared as necrotic silvering on the leaves and resulted in curling, deformation and withering of the leaves and early senescence or deformation of the flowers. Sexual and arrhenotokous parthenogenetic reproduction took place, and development took 9-17 days in males and 13-21 days in females. There were about 10 generations a year in Dehra Dun. Unmated females had longer oviposition periods and laid fewer eggs than mated ones.