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WHITE PINE WEEVIL, PISSODES STROBI (COLEOPTERA: CURCULIONIDAE), ATTACK ON VARIOUS CONIFERS IN NEW YORK

Published online by Cambridge University Press:  31 May 2012

Thomas W. Phillips  and
Gerald N. Lanier
Thomas W. Phillips
Affiliation:
Department of Environmental and Forest Biology, State University of New York, College of Environmental Science and Forestry, Syracuse 13210
Gerald N. Lanier
Affiliation:
Department of Environmental and Forest Biology, State University of New York, College of Environmental Science and Forestry, Syracuse 13210
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Abstract

Field studies were conducted in which adult white pine weevils, Pissodes strobi (Peck), were confined on the leaders of six different conifer species and various parameters of weevil attack were recorded. Eastern white pine, Pinus strobus, the preferred native host, was the most susceptible to attack and the most suitable for brood production. All white pine leaders on which 3 or 6 male–female pairs of weevils were confined were killed, and mean numbers of emerging brood adults per leader were 26.0 and 37.3, respectively. Some leaders of the other species of pine and of spruce, Picea spp., were also killed, but brood production from them was very low. White spruce, P. glauca, leaders proved to be the least suitable for production of brood because no adult progeny emerged, even from leaders that had been killed.

Résumé

Au cours de tests de terrain, des adultes du charançon du pin blanc, Pissodes strobi, ont été confinés sur des pousses apicales de six différentes espèces de conifères et divers paramètres se rapportant à l'attaque du charançon ont été mesurés. Le pin blanc Pinus strobus, hôte indigène préféré, s'est avéré le plus susceptible à l'attaque et le plus convenable pour la production de progéniture. Toutes les pousses de pin blanc sur lesquelles de 3 à 6 paires (mâle-femelle) du charançon étaient confinées sont mortes et les nombres moyens d'adultes émergés par pousse étaient de 26.0 et 37.3, respectivement. Certaines pousses d'autres espèces de pin et d'épinette, Picea spp. sont mortes aussi, mais la production de progéniture y fût très faible. Les pousses d'épinette blanche, P. glauca, se sont avérées les moins convenables pour la production de progéniture car aucune progéniture adulte n'en est émergée, même pour les pousses qui sont mortes.

Type
Articles
Information
The Canadian Entomologist , Volume 115 , Issue 12 , December 1983 , pp. 1637 - 1640
Copyright
Copyright © Entomological Society of Canada 1983

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