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POTATO TRAP CROPS FOR CONTROL OF COLORADO POTATO BEETLE (COLEOPTERA: CHRYSOMELIDAE) IN TOMATOES

Published online by Cambridge University Press:  31 May 2012

D.W.A. Hunt  and
G. Whitfield
D.W.A. Hunt
Affiliation:
Agriculture and Agri-Food Canada, Research Centre, Harrow, Ontario, Canada N0R 1G0
G. Whitfield
Affiliation:
Agriculture and Agri-Food Canada, Research Centre, Harrow, Ontario, Canada N0R 1G0
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Abstract

The use of potato as a trap crop for the Colorado potato beetle, Leptinotarsa decemlineata (Say), in processing tomatoes was evaluated. The proportion of beetles counted on potato trap rows vs. the tomato crop on a per plant basis was 0.99, 1 week after transplanting, and never fell below 0.93 on any sampling date. In tomato plots that received no insecticides, potato trap rows placed as much as 16 tomato beds apart were effective in reducing beetle numbers on the tomatoes and producing crop yields 61–87% higher than plots without trap rows. Four of six pairs of plots had significantly fewer adult beetles and significantly higher tomato yields when a potato trap crop was present.

Résumé

Nous avons évalué l’efficacité de rangs intercalés de pommes de terre pour capturer des Doryphores de la pomme de terre, Leptinotarsa decemlineata (Say), dans des champs de tomates. La proportion de chrysomèles sur les rangs de pommes de terre plutôt que sur les récoltes de tomates (nombre par plant) a été estimée à 0,99 une semaine après la transplantation et n’a jamais été sous 0,93 par la suite. Dans les champs de tomates qui n’ont reçu aucun insecticide, la présence de rangs intercalés de pommes de terre, même à tous les 16 rangs de tomates, s’est avérée efficace pour réduire le nombre de chrysomèles sur les tomates et ces champs ont produit de 61 à 87% plus de tomates que les champs ne comptant pas de rangs de pommes de terre. Quatre des six paires de champs contenaient significativement moins de chrysomèles sur les plants de tomates et ils ont produit significativement plus de tomates en présence de rangs de pommes de terres.

[Traduit par la Rédaction]

Type
Articles
Information
The Canadian Entomologist , Volume 128 , Issue 3 , June 1996 , pp. 407 - 412
Copyright
Copyright © Entomological Society of Canada 1996

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