Effects of starvation on the development and reproduction of Hyphantria cunea
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Key Words：Hyphantria cunea, starvation, larval duration, survival, fecundity
Abstract：The effects of starvation in different instar larvae were studied on the development and reproduction of Hyphantria cunea. Short time starvation in the 2nd instar larvae had no significant effects on the development and reproduction. Twoday, 4-day and 6-day starvation in the 4th instar larvae showed the higher larval mortality, the longer duration of larval stage, and the lower ratio of pupation, eclosion and fecundity. Fourday starvation in the 6th instar larvae showed a bit lower ratio of survival, pupation, eclosion and fecundity. Twelveday starvation in the 6th instar larvae caused that 70% larvae pupated ahead without web outside, which had greatly lower ratio of eclosion and mating, and less egg amount.