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2012年49 No.4
Effects of different food plants on the growth，development andreproduction of fall webworm，Hyphantria cunea，larvae
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Key Words： Hyphantria cunea，leaf consumption，food plant，growth and development
Abstract：Larvae of the first generation of Hyphantria cunea ( Drury) were reared on leaves of four different food plant
species; Fraxinus pennsylvanica Marsh． ，Populus × euramericana‘Neva’，Platanus orientalis L． and Ulmus pumila L． ，
under laboratory conditions in June and July 2010，and their food consumption，development and reproduction measured
and compared． Larvae reared on F． pennsylvanica had the highest leaf consumption with each larva consuming about
2. 21 g leaves to complete from hatching to pupation，followed by larvae raised on P． × euramericana ‘Neva’which
consumbed 1. 95 g． Larvae raised on P． orientalis and U． pumila consumed much less food throughout the larval stage，
about 1. 85 g and 1. 68 g respectively． Differences in consumption of the different food plants first became apparent in
fourth instar larvae and were particularly obvious in the fifth and sixth instars． Different food plants had significant effects
on larval and pupal developmental duration，survival rate，pupal weight and fecundity． Our results indicate that P．
orientalis does not support optimal larvae development and reproduction because feeding larvae on the leaves of this plant
prolonged larval stages，decreased pupal weight and reduced average fecundity．