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Recognition of three biotypes of the pea aphid from southern Quebec



Recognition of three biotypes of the pea aphid from southern Quebec



Jour Econ Ent 52(2): 293-294



When three lines (R1, R2 and R3) of the pea aphid (Macrosiphum pisi (Harris)) were reared simultaneously for 9 days at 69oF 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. Rl, R2 and R3 females averaged respectively 3.4, 2.6 and 2 mg on Perfection and 2.4, 1.4 and 1 on Onward; the mean numbers of progeny per three females were 192, 134 and 101 on Perfection and 75, 20 and 35 on Onward. Overactivity in adults maintained on Pride and Onward was apparently associated with undernourishment. However, nymphs born on the resistant varieties reached the adult stage without any sign of overactivity.

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Accession: 014163195

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DOI: 10.1093/jee/52.2.293


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