Madras Agricultural Journal
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INFLUENCE OF HOST EGGS ON THE ECOTYPES OF THE EGG PARASITOID Trichogramma chilonis ISHII

Abstract

                                Six ecotypes of Trichogramma chilonis collected from Gudimangalam, Palladam, Udumalpet, Pongalur, Chingleput and Mettupalayam, were compared with the laboratory strain of the same species (Coimbatore). All the ecotypes were significantly superior to the laboratory strain in parasitizing the eggs of Corcyra cephalonica, Heliothis armigera and Spodoptera litura and showed a distinct preference for H. armigera eggs. The Palladam ecotype was able to withstand starvation to a maximum extent of 6.86 days.

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