oa Journal of the Entomological Society of Southern Africa - Some aspects of parasitism in field populations of Plutella maculipennis Curt
The efficiency of the individual species of parasites attacking any host insect is governed by a number of factors. Perhaps the most important of these is the psychological one which concerns the ability of the female to discriminate between hosts which are suitable for the development of her progeny and those which are not. Without such a faculty, an appreciable wastage of progeny must result through the female ovipositing in hosts which have been parasitized already by individuals of her own or another species.
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