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GROWTH OF PEA APHID, ACYRTHOSIPHON PISUM (HARRIS) (HOMOPTERA: APHIDIDAE), POPULATIONS ON CAGED PLANTS OF SIX CULTIVARS OF FIELD PEAS AND THE EFFECTS OF PEA APHIDS ON HARVEST COMPONENTS OF CAGED FIELD PEAS

Published online by Cambridge University Press:  31 May 2012

J.J. Soroka  and
P.A. Mackay
J.J. Soroka
Affiliation:
Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
P.A. Mackay
Affiliation:
Department of Entomology, University of Manitoba, Winnipeg, Manitoba, Canada R3T 2N2
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Abstract

A comparison of the effects of infestation by known numbers of pea aphids, Acyrthosiphon pisum (Harris), on six field pea cultivars was made in field cage tests. The largest population of aphids developed on the cultivar Trapper and the smallest on the cultivar Century, with differences in aphid numbers between these cultivars significant for mature plants. Infested plants of Trapper had a significantly lower number of pods per plant, and infested plants of all cultivars had decreased seed weights, both per metre row and of 250 seeds, when compared with control plants. In all cultivars except Trapper, the most severely affected yield component was weight of 250 seeds.

Résumé

L’effet d’infestation par des nombres connus du puceron des pois, Acrythosiphon pisum (Harris), a été comparé sur six cultivars de pois des champs pendant les essais en cages sur le champ. La population la plus importante de pucerons a développé sur le cultivar Trapper et la moins importante sur le cultivar Century, la différence en nombre de pucerons entre ces cultivars étant significative au cas des plants à maturité. Les plants de Trapper qui ont été infestés ont eu un nombre significativement plus bas de cosses par plant et les plants infestés de tous les cultivars ont démontré une réduction aux poids de graines, et par rangée d’un mètre et par 250 graines, à comparer aux plants témoins. Pour tous les cultivars, sauf Trapper, le facteur constitutif touché le plus sévèrement a été le poids de 250 graines.

Type
Research Article
Information
The Canadian Entomologist , Volume 122 , Issue 6 , December 1990 , pp. 1193 - 1199
Copyright
Copyright © Entomological Society of Canada 1990

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Footnotes

1

Present address: Agriculture Canada Research Station, 107 Science Crescent, Saskatoon, Saskatchewan, Canada S7N 0X2.

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