oa Journal of the Entomological Society of Southern Africa - Biology of the hyperparasite Pachyneuron concolor (F rster) (Hymenoptera: Pteromalidae) reared on Microterys flavus (Howard) in brown soft scale

Volume 44, Issue 1
  • ISSN : 0013-8789



P. concolor was found to be a solitary ectoparasite. The calculated threshold temperature for development was 9,8 �C and the thermal constant was 242,6 day-degrees. Only males developed from eggs laid on a small host-species (Metaphycus flavus (Howard)) and were 41% smaller than males that developed from eggs laid on a larger host-species (Microterys flavus). At 28 �C the life span of females at 0% RH was only one-fourth as long as at 50% RH. The life span of both sexes without any food or with pollen or water was very short (1-3 days) as compared with that with honey (3-30 days).

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