HOST LOCATING BEHAVIOR OF LESCHENAULTIA EXUL AND PATELLOA-PACHYPYGA -2 TACHINID PARASITOIDS OF THE FOREST TENT CATERPILLAR, MALACOSOMA-DISSTRIA

Citation
Eb. Mondor et J. Roland, HOST LOCATING BEHAVIOR OF LESCHENAULTIA EXUL AND PATELLOA-PACHYPYGA -2 TACHINID PARASITOIDS OF THE FOREST TENT CATERPILLAR, MALACOSOMA-DISSTRIA, Entomologia experimentalis et applicata, 85(2), 1997, pp. 161-168
Citations number
30
Categorie Soggetti
Entomology
ISSN journal
00138703
Volume
85
Issue
2
Year of publication
1997
Pages
161 - 168
Database
ISI
SICI code
0013-8703(1997)85:2<161:HLBOLE>2.0.ZU;2-J
Abstract
Leschenaultia exul (Townsend) and Patelloa pachypyga (Aldrich & Webber ) (Diptera: Tachinidae) are the principal larval parasitoids of the fo rest tent caterpillar (FTC) Malacosoma disstria (Hubner) (Lepidoptera: Lasiocampidae) in Canada. The response of these two fly species to M. disstria differs depending on the tree species on which the host feed s. In wind tunnel experiments, L. exul spent more time on the side of the tunnel containing volatiles from FTC frass and was attracted to th e FTC-aspen poplar (Populus tremuloides Michx.) complex preferentially to the FTC-balsam poplar (Populus balsamifera L.) complex. Field bioa ssays confirmed that this fly species was preferentially attracted to the herbivore-aspen poplar complex as compared to the herbivore-balsam poplar complex. In field bioassays, P. pachypyga was also attracted p referentially to aspen poplar toes containing FTC larvae? compared to balsam poplar trees with host larvae.