Biotic interactions in relation to prey-predator relationship with special reference to some thrips species (Thysanoptera: Insecta)

Abstract

Comparative predatory efficiency, feeding behavior, fecundity and life cycle of three species of polyphagous predatory thrips, Erythrothrips asiaticus, Franklinothrips megalops and Androthrips flavipes were studied under field conditions. Adults of both F. megalops and E. asiaticus fed only on eggs of the prey thrips, whereas their larvae fed both on the larvae and adults of prey thrips. Significant variation in prey consumption was shown by each developmental stage of E. asiaticus . The II instar larva was more efficient in prey consumption than the first instar larva. The adult prey was least preferred and the first instar larva of the prey was highly preferred. Females fed on more eggs than the males.