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SUSCEPTIBILITY OF A MIGRATORY POPULATION OF THE CORN EARWORM (HELIOTHIS ZEA) (LEPIDOPTERA: NOCTUIDAE) TO INSECTICIDES

Published online by Cambridge University Press:  31 May 2012

R. J. McClanahan
R. J. McClanahan
Affiliation:
Research Station, Agriculture Canada, Harrow, Ontario N0R 1G0
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Abstract

Dosage–mortality relationships were determined for 17 insecticides applied to first instar and second instar larvae of Heliothis zea (Boddie), derived from migratory moths. The synthetic pyrethroid insecticides, especially deltamethrin, were highly toxic to both stages. Methomyl and profenofos were also equally toxic to both stages, however all other insecticides were less effective against the later stage larvae. In these tests carbofuran, acephate, methamidophos, and carbaryl exhibited extremely low toxicity. One of the pyrethroids, parathion or methomyl, is suggested for protection of late-planted sweet corn against corn earworm.

Type
Articles
Information
The Canadian Entomologist , Volume 114 , Issue 12 , December 1982 , pp. 1175 - 1177
Copyright
Copyright © Entomological Society of Canada 1982

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References

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