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Since 1934, when studies of aphids infesting potatoes were begun in New Brunswick, it has been observed that a large number of potato aphids are attacked by parasices each season. More attention was given to parasitized aphids in 1950 than in previous years, in a study of parasitism as a factor in aphid control. In this paper are recorded the parasites reared from aphids collected on potatoes and other hosts in New Brunswick in 1950.
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MacGillivray et al. (1953) studied this question.
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