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ASSESSMENT OF A SEX-ATTRACTANT TRAP FOR MONITORING THE SPOTTED TENTIFORM LEAFMINER, PHYLLONORYCTER BLANCARDELLA (FABR.) (LEPIDOPTERA: GRACILLARIIDAE): RELATIONSHIP BETWEEN MALE AND FEMALE EMERGENCE AND BETWEEN TRAP CATCHES AND EMERGENCE

Published online by Cambridge University Press:  31 May 2012

R.M. Trimble
R.M. Trimble
Affiliation:
Agriculture Canada Research Station, Vineland Station, Ontario, Canada L0R 2E0
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Abstract

The temporal relationship between male and female emergence and the relationship between attractant-baited trap catches and emergence of the spotted tentiform leafminer, Phyllonorycter blancardella (Fabr.), were studied in commercial apple orchards in Norfolk County, Ontario, during 1983 and 1984. The onset and progression of male and female emergence was highly synchronized during each of the three-yearly activity periods. The traps were a sensitive indicator of the onset of the spring-emergence period. However, peaks in the numbers of moths trapped did not occur at times of peak moth emergence and changes in the size of trap catches were not a reliable indicator of changes in the rate of moth emergence. During the spring-emergence period, peaks in trap catch were associated with relatively high daily air temperatures.

Résumé

Le rapport temporal entre l’émergence mâle et femelle, et le rapport entre les captures au piège appâté d’attractif et l’émergence de la mineuse du pommier, Phyllonorycter blancardella (Fabr.), ont été étudiés dans des vergers de pommes commerciaux du comté de Norfolk (Ontario) en 1983 et 1984. Le début et la progression de l’émergence mâle et femelle sont hautement synchronisés pendant chacune des trois périodes d’activité annuelles. Les pièges sont un bon indicateur du début de la période d’émergence printanière. Mais le plus grand nombre de spécimens piégés ne coïncide pas aux époques de pic d’émergence et les variations du nombre de captures au piège ne constituent pas un indicateur fiable des variations du taux d’émergence. Pendant la période d’émergence printanière, les pics de capture sont reliés à des températures quotidiennes de l’air relativement élevées.

Type
Articles
Information
The Canadian Entomologist , Volume 118 , Issue 12 , December 1986 , pp. 1241 - 1253
Copyright
Copyright © Entomological Society of Canada 1986

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