oa Journal of the Entomological Society of Southern Africa - The life history of Chrysopa zastrowi Esb.-Pet. (Neuroptera: Chrysopidae)

Volume 38, Issue 1
  • ISSN : 0013-8789



The mean durations of the egg, larval and pupal stages of Chrysopa zastrowi Esb.-Pet. are 4,0, I I,5 and 10,2 days respectively. Adults lived under laboratory conditions for up to 66 days. The cannibalistic larvae are voracious feeders, especially during the final instar, consuming an average of nearly 500 and over 900 wheat aphids or potato tuber moth eggs respectively, during the larval stage. Third instar larvae showed no preference when offered a variety of six prey species, but survived better on some species than on others. Evidence is given which could throw more light on certain aspects of cocoon construction and the adult's emergence therefrom. Adults are mainly nocturnal in habit and probably reed on honeydew, nectar and possibly also pollen.

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