oa Journal of the Entomological Society of Southern Africa - Extended diapause in Zonocryptus xanthomerus Brull (Hymenoptera: Ichneumonidae)



Delayed emergence up to two years is recorded. The ichneumonid parasitizes larvae of Mesocelis montana Cramer. The Ichneumon Zonocryptus xanthomerus Brull� is a parasite of the larva of Mesocelis montana Cramer (Lepidoptera: Lasiocampidae), which is a serious pest of mesembryanthemums in parts of Namaqualand (Waiters, Waiters & Lourens, 1971). The Ichneumon larvae leave the parasitized caterpillar just before the latter pupates in spring and then spin light brown silken cocoons within the cocoon already constructed by the caterpillar, the tough cocoon of the latter affording additional protection to the diapausing parasite. Up to ten parasites per caterpillar have been recorded.


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