Journal of Biological Control

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The walnut ( Juglans regia Linn.) an important dry fruit in Himalayas is infested by several insects including Callaphis juglandis Kaltenbach, Chromaphis juglandicola Kaltenbach (Masoodi et ai., 1987) and C.hiraustibis (Kumar and Lavigena, 1970). During the course of a routine faunsitic survey in 1985-86 several predators were observed feeding on C.juglandis of which, a neuropteran Chrysoperla carnea (Stephens) was found to be predominant one. But no attempts seems to have been made to evaluate the predatory efficiency of C. carnea by providing dusky veined walnut aphis (C.juglandis) as prey. Keeping this in view, studies were initiated on the biology and predatory potential of C. carnea on C.juglandis.
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