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FIELD EVALUATION OF INSECTICIDES FOR THE CONTROL OF THE EUROPEAN SKIPPER, THYMELICUS LINEOLA (LEPIDOPTERA: HESPERIIDAE), IN QUEBEC1

Published online by Cambridge University Press:  31 May 2012

Michel Letendre  and
Jeremy N. McNeil
Michel Letendre
Affiliation:
Service de recherche en défense des cultures, Agriculture Québec, Ste-Foy, Québec G1P 3W8
Jeremy N. McNeil
Affiliation:
Département de biologie, Université Laval, Ste-Foy, Québec G1K 7P4
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Abstract

The efficacy of seven chemical insecticides, five commercial preparations of Bacillus thuringiensis, and two preparations containing diatom dust were tested against the European skipper, Thymelicus lineola (Ochs.), under field conditions. Satisfactory control was obtained with carbaryl, carbofuran, methomyl, permethrin, trichlorfon, Dipel 45B(=Dipel SC), Dipel WP, Thuricide 26B, Thuricide HPC, and Novabac 3 while dimethoate, chlorpyrifos, and the diatom dusts afforded little or no foliage protection. While larval mortality occurred less rapidly when B. thuringiensis preparations were applied, their use is strongly recommended as they afford the same degree of foliage protection as chemical insecticides and diminish possible undesirable off-target effects.

Résumé

L’efficacité de sept insecticides chimiques, cinq préparations commerciales de Bacillus thuringiensis et deux préparations de terre à diatomées a été testée en parcelles contre l’hespérie des graminées (Thymelicus lineola (Ochs.)). Un niveau de contrôle satisfaisant a été obtenu avec les produits suivants : carbaryl, carbofuran, méthomyl, perméthrine, trichlorfon, Dipel 45B(=Dipel SC), Dipel WP, Thuricide 26B, Thuricide HPC et Novabac 3. Cependant, le diméthoate, le chlorpyrifos et la terre à diatomées n’ont pas permis de protéger efficacement le feuillage. Bien que la mortalité larvaire s’établisse d’une façon beaucoup plus lente avec les formulations bactériennes, nous recommandons l’utilisation de ces insecticides biologiques parce qu’ils offrent des résultats comparables à ceux obtenus avec les insecticides chimiques tout en ne présentant pas autant de danger pour les organismes non visés.

Type
Articles
Information
The Canadian Entomologist , Volume 111 , Issue 12 , December 1979 , pp. 1313 - 1317
Copyright
Copyright © Entomological Society of Canada 1979

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References

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