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MONITORING ANNUAL FLIGHT PATTERNS OF THE POTATO APHID MACROSIPHUM EUPHORBIAE (HOMOPTERA: APHIDIDAE), IN SOUTHERN ONTARIO

Published online by Cambridge University Press:  31 May 2012

W. M. Elliott
W. M. Elliott
Affiliation:
Research Station, Agriculture Canada, Harrow, Ontario N0R 1G0
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Abstract

Populations of flying potato aphids (Macrosiphum euphorbiae (Thomas)), available to initiate new infestations on crops, were measured by plant trapping from 1966 to 1971 and by suction trapping from 1967 to 1978 at Harrow, Ontario. Yearly total catches were extremely variable and in some years there were periods of 2 weeks without catches during the summer. The long term annual flight pattern was a unimodal curve with a peak in August. Counts by plant trapping correlated with those obtained by suction trapping, and catches on Brussels sprouts, tomatoes, and peppers were all positively correlated. Plants exposed on a background of bare soil attracted more alatae than those exposed on a background of mowed weeds. The first female alatae were caught in the suction traps on 21 June ± 5 days each year and the first male alatae on 22 October ± 2 days. The last female alatae were caught on 21 October ± 5 days and the last males on 6 November ± 2 days.

Résumé

Les populations ailées du puceron de la pomme de terre (Macrosiphum euphorbiae (Thomas)), susceptibles de déclencher des infestations en culture, ont été mesurées à Harrow (Ontario) par piégeage sur plante de 1966 à 1971 et par piège aspirant de 1967 à 1978. Les prises totales annuelles étaient extrêmement variables et, en plus, certains étés on a observé des intervalles de 2 semaines sans aucune prise. Le schéma annuel de vol suivait à long terme, une courbe unimodale faisant pic en août. Les dénombrements obtenus par piégeage sur plante s’accordaient aux prises obtenues par succion et, d’autre part, les prises enregistrées sur le chou de Bruxelles, la tomate et le poivron étaient toutes corrélées positivement. Les plantes cultivées en sol nu attiraient plus de pucerons ailés que les plantes poussant sur tapis de mauvaises herbes fauché. Les premières femelles ailées sont apparues dans les pièges à succion le 21 juin, plus ou moins 5 jours, et les maies le 22 octobre, plus ou moins 2 jours. Les dernières femelles ailées ont été capturées le 21 octobre (plus ou moins 5 jours) et les derniers mâles le 6 novembre (plus ou moins 2 jours).

Type
Articles
Information
The Canadian Entomologist , Volume 112 , Issue 9 , 01 September 1980 , pp. 963 - 968
Copyright
Copyright © Entomological Society of Canada 1980

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