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SUSCEPTIBILITY OF 31 SPECIES OF AGRICULTURAL INSECT PESTS TO THE ENTOMOGENOUS NEMATODES STEINERNEMA FELTIAE AND HETERORHABDITIS BACTERIOPHORA1

Published online by Cambridge University Press:  31 May 2012

O. N. Morris
O. N. Morris
Affiliation:
Agriculture Canada, Research Station, Winnipeg, Manitoba R3T 2M9
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Abstract

The susceptibility of 31 species of agricultural insect pests representing 7 families of Lepidoptera, 3 of Diptera, and 3 of Coleoptera to the entomogenous nematodes Steinernema feltiae Filipjev and Heterorhabditis bacteriophora Poinar, were investigated in the laboratory. Of the 27 species found susceptible to S. feltiae, 19 are reported for the first time. Of the 21 species killed by H. bacteriophora, 15 are reported for the first time. The Lepidoptera as a group were highly susceptible to the nematodes. On the basis of larval mortality caused by the nematodes, of nematode reproduction in insect cadavers, and of the known economic importance and life histories of the test insects, S. feltiae was judged to warrant further research as a possible biological-control agent against Euxoa ochrogaster (Guenée), E. auxiliaris (Grote), Agrotis orthogonia (Morr.), Actebia fennica (Tauscher), Mamestra configurata Walker, Delia radicum (L.), D. antiqua (Meig.), and Zygogramma exclamationis (F.).

Résumé

On a étudié en laboratoire la susceptibilité de 31 espèces d'insectes nuisibles en agriculture, représentant 7 familles de Lépidoptères, 3 de Diptères, et 3 de Coléoptères, à l'infection par les nematodes entomogènes Steinernema feltiae Filipjev et Heterorhabditis bacteriophora Poinar. Parmi les 27 espèces trouvées susceptibles à S. feltiae, 19 l'étaient pour la première fois. Des 21 espèces susceptibles à H. bacteriophora, 15 sont mentionnées pour la première fois. Dans l'ensemble, les Lépidoptères se sont avérés très susceptibles. D'après la mortalité larvaire causée par les nematodes, leur reproduction dans les cadavres d'insectes, et l'importance économique des insectes testés, on juge que S. feltiae devrait être étudié davantage en tant qu'auxiliaire possible de lutte contre Euxoa ochrogaster (Guenée), E. auxiliaris (Grote), Agrotis orthogonia (Morr.), Actebia fennica (Tauscher), Mamestra configurata Walker, Delia radicum (L.), D. antiqua (Meig.), et Zygogramma exclamationis (F.).

Type
Articles
Information
The Canadian Entomologist , Volume 117 , Issue 4 , April 1985 , pp. 401 - 407
Copyright
Copyright © Entomological Society of Canada 1985

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