Recognition of Three Biotypes of the Pea Aphid from Southern Quebec

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When three lines (R1, R2 and R3) of the pea aphid (Macro- siphum pisi (Harris)) were reared simultaneously for 9 days at 69° F. each on one susceptible (Perfection) and two resistant (Pride and Onward) varieties of peas, Pisum sativum L., the lines differed in mean weights and numbers of females produced. R1, R2 and R3 females averaged respectively 3.4, 2.6 and 2.0 mg. on Perfection and 2.4, 1.4 and 1.0 on Onward; the mean numbers of progeny per three females were 192, 134 and 101 on Perfection and 75,20 and 35 on Onward. Over activity in adults maintained on Pride and Onward was apparently associated with under- nourishment. However, nymphs born on the resistant varieties reached the adult stage without any sign of over activity.

Document Type: Research Article

Publication date: April 1, 1959

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  • Journal of Economic Entomology is published bimonthly in February, April, June, August, October, and December. The journal publishes articles on the economic significance of insects and is divided into the following sections: apiculture & social insects; arthropods in relation to plant disease; forum; insecticide resistance and resistance management; ecotoxicology; biological and microbial control; ecology and behavior; sampling and biostatistics; household and structural insects; medical entomology; molecular entomology; veterinary entomology; forest entomology; horticultural entomology; field and forage crops, and small grains; stored-product; commodity treatment and quarantine entomology; and plant resistance. In addition to research papers, Journal of Economic Entomology publishes Letters to the Editor, interpretive articles in a Forum section, Short Communications, Rapid Communications, and Book Reviews.
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