R. D. Hughes, Dorothy D. Salter, Natural Mortality of Erioischia brassicae (Bouche) (Diptera, Anthomyiidae) During the Immature Stages of the First Generation, Journal of Animal Ecology, Vol. 28, No. 2 (Nov., 1959), pp. 231-241
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Hughes et al. (1959) studied this question.
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