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EVALUATION OF FOLIAR SPRAYS AGAINST THE TUBER FLEA BEETLE, EPITRIX TUBERIS GENTNER (COLEOPTERA: CHRYSOMELIDAE), ON POTATO

Published online by Cambridge University Press:  31 May 2012

R.S. Vernon  and
J.R. Mackenzie
R.S. Vernon
Affiliation:
Agriculture Canada Research Station, 6660 NW Marine Drive, Vancouver, British Columbia, Canada V6T 1X2
J.R. Mackenzie
Affiliation:
Agriculture Canada Research Station, 6660 NW Marine Drive, Vancouver, British Columbia, Canada V6T 1X2
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Abstract

The efficacies of registered and unregistered foliar sprays against the tuber flea beetle, Epitrix tuberis Gentner, were compared in 1987, 1988, and 1989 at Abbotsford, B.C. Beetles were released serially in treatment plots and visually counted after each release to determine the effectiveness and longevity of residual control. In 1989, emergence cages placed over previously treated plants measured the effect of sprays on the next generation of beetles. Pyrethroids generally resulted in beetle mortality for longer periods of time than did the nonpyrethroids carbaryl, endosulfan, chlorpyrifos, and methamidophos. Several pyrethroids provided residual beetle control for up to 7 days after application. In 1989, bifenthrin, cyfluthrin, cypermethrin, and deltamethrin were as effective in suppressing emergence of the next generation of beetles as was granular phorate applied at seeding. These studies demonstrated that foliar sprays can be a key component of E. tuberis management programs, especially those operating on soil types where the use of granular insecticides is restricted.

Résumé

L’efficacité des substances enregistrés et non-enregistrés pour l’arrosage des feuilles contre l’altise des tubercules, Epitrix tuberis Gentner, a été comparée en 1987, 1988 et 1989 à Abbotsford, C.B. Les altises adultes ont été relâchées en série aux terrains de traitement et ont été comptées visuellement après chaque relâchement pour déterminer l’efficacité et la durée résiduelle du contrôle. En 1989, les cages d’éclosion, mises par-dessus des plantes traitées auparavant, ont laissé déterminer l’effet des substances d’arrosage pour la génération suivante des altises adultes. Les pyréthroïdes ont opéré normalement pour occasionner la mortalité des altises adultes pendant une durée plus étendue que les carbaryles, l’endosulfane, le chlorpyrifos et le méthamidophos. Plusieurs sortes de pyréthroïdes ont fourni un contrôle résiduel des altises adultes jusqu’à 7 jours suivant l’arrosage. En 1989, bifenthrine, cyfluthrine, cyperméthrine et deltométhrine ont été aussi efficaces à supprimer l’éclosion de la génération suivante des altises adultes que la phorate granuleuse arrosée au moment des semailles. Ces études démontrent que les substances arroseurs de feuilles peuvent agir comme constituants-clés aux programmes de contrôle de E. tuberis, surtout sur les sols où l’utilisation d’insecticides granuleux est restreinte.

Type
Articles
Information
The Canadian Entomologist , Volume 123 , Issue 2 , April 1991 , pp. 321 - 331
Copyright
Copyright © Entomological Society of Canada 1991

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