Effects of Feeding Different Target Pests on the Growth, Development and Adult Fecundity of Chrysoper carnea

【Objective】 To research into the growth, development and adult fecundity of Chrysoper carnea (Stephens) fed with different target pests.【Method】By feeding Aphis gossypii, Tetranychus turkestani and egg of Sitotroga cerealella to larva of Chrysoper carnea to study its duration, mortality and fecundity.【Result】Through laboratory bioassay method, the larva of Chrysoper carnea fed with Tetranychus turkestani only developed to 2nd instar, and was unable to complete their life. The growth pupal period of Chrysoper carnea fed with Aphis gossypii was shorter than that of the treatment fed with egg of Sitotroga cerealella, the 1st and 2nd instar of larva on development period were significantly different, and the adult emergence rate, preoviposition period, egg-laying number and life span of female were higher than those fed with egg of Sitotroga cerealella, but there was no significant difference between them.【Conclusion】The growth period, mortality, eclosion rate and fecundity per female of Chrysoper carnea were significantly different to those fed with different target pests, which verified that although larva of Chrysoper carnea could prey on some insects (mite), but some prey's nutrition failed to satisfy its development.