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IDENTIFICATION AND EVALUATION OF DAMAGE TO McINTOSH APPLES BY PHYTOPHAGOUS MIRIDS (HEMIPTERA: MIRIDAE) IN SOUTHWESTERN QUEBEC1

Published online by Cambridge University Press:  31 May 2012

Guy Boivin
Affiliation:
Department of Entomology, Macdonald Campus of McGill University, Ste. Anne de Bellevue, Quebec H9X 1C0
R. K. Stewart
Affiliation:
Department of Entomology, Macdonald Campus of McGill University, Ste. Anne de Bellevue, Quebec H9X 1C0

Abstract

Damage to apple (cv. McIntosh) by five species of phytophagous mind bugs was characterized by confining numbers of them in sleeve-cages placed on apple-bearing branches. Overwintering adults of Lygus lineolaris (P. de B.) pierced apple buds and flowers early in the spring but did little damage after fruit-set. The damage caused to apples by young nymphs of Lygocoris communis (Knight) and Lygidea mendax Reuter was mostly either deep circular depressions or long sinuous scars. Campylomma verbasci (Meyer) and Heterocordylus malinus Reuter were of little importance in the orchard studied. All species did cause circular depressions (“pits”) in fruit and some damage to leaves.

Résumé

Les dommages causés par cinq espèces de miridés phytophages aux pommes Mcintosh ont été caractérisés au moyen de cages de mousseline placées sur des branches de pommier. Les adultes hivernants de Lygus lineolaris (P. de B.) ont piqué les bourgeons et les fleurs du pommier tôt au printemps mais ont causé peu de dommage après le calice. Les jeunes larves de Lygocoris communis (Knight) et Lygidea mendax Reuter ont été responsables de la plus grande partie des dommages causés aux pommes sous forme de profondes dépressions circulaires ou de longues cicatrices brunâtres. Campylomma verbasci (Meyer) et Heterocordylus malinus Reuter n'ont pas causé de dégâts importants dans le verger étudié. Toutes ces espèces peuvent causer des dépressions circulaires (“pits”) sur les pommes et des perforations sur les feuilles.

Type
Articles
Copyright
Copyright © Entomological Society of Canada 1982

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