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LABORATORY EVALUATION OF INSECTICIDES FOR CONTROL OF ACYRTHOSIPHON PISUM (HEMIPTERA: APHIDIDAE) IN ALFALFA

Published online by Cambridge University Press:  31 May 2012

S. McDonald  and
A. M. Harper
S. McDonald
Affiliation:
Research Station, Agriculture Canada, Lethbridge, Alberta T1J 4B1
A. M. Harper
Affiliation:
Research Station, Agriculture Canada, Lethbridge, Alberta T1J 4B1
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Abstract

Of 11 insecticides tested, nine were as effective as dimethoate for control of the pea aphid, Acyrthosiphon pisum (Harris), in alfalfa. None, including the systemic insecticides, provided adequate protection in growing alfalfa at 7 days after treatment. The environmental impact of these materials could be reduced if the lowest effective rates were used for control because repeat applications may be required. Because pirimicarb at 0.28 kg AI/ha had a reduced effect on Chrysopa oculata (Say), a predator of the pea aphid, it would be preferred to dimethoate for control of this aphid.

Type
Articles
Information
The Canadian Entomologist , Volume 110 , Issue 2 , 01 February 1978 , pp. 213 - 216
Copyright
Copyright © Entomological Society of Canada 1978

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