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EFFECTIVENESS OF STEINERNEMATID AND HETERORHABDITID NEMATODES AGAINST NOCTUID, PYRALID, AND GEOMETRID SPECIES IN SOIL1

Published online by Cambridge University Press:  31 May 2012

O.N. Morris  and
V. Converse
O.N. Morris
Affiliation:
Agriculture Canada Research Station, 195 Dafoe Road, Winnipeg, Manitoba, Canada R3T 2M9
V. Converse
Affiliation:
Agriculture Canada Research Station, 195 Dafoe Road, Winnipeg, Manitoba, Canada R3T 2M9
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Abstract

Larvae of one pyralid, five noctuid, and one geometrid species were exposed to six species/strains of steinernematid and two species of heterorhabditid nematodes applied to soil surface in the laboratory. The most parasitic nematodes were Steinernema bibionis Bovien for the wax moth (Galleria mellonella L.) and the bertha armyworm (Mamestra configurata Wlk.), Heterorhabditis heliothidis (Khan, Brooks, and Hirschmann) for the cereal armyworm [Pseudaletia unipuncta (Haw)], S. feltiae Filipjev Mexican for the variegated cutworm [Peridroma saucia (Hbn.)], and S. feltiae All for the red-backed cutworm [Euxoa ochrogaster (Gwen)] and the spring cankerworm [Paleacrita vernata (Peck.)]. When both LD50 values and rates of parasitism of the hosts were considered together, the most promising nematode for soil applications was S. feltiae against the bertha armyworm.

Résumé

Des larves d’une espèce de pyrale, de cinq espèces de noctuelles et d’une espèce de géomètre ont été exposées à six espèces/lignées de nématodes steinernématoïdes et à deux espèces de nématodes hétérorhabtidoïdes placées à la surface du soil au laboratoire. Les nématodes les plus parasitiques ont été comme suit : Steinernema bibionis Bovien pour la fausse teigne de la cire (Galleria mellonella L.) et pour la légionnaire bertha (Mamestra configurata Wlk.); Heterorhabditis helothidis (Khan, Brooks et Hirschmann) pour la légionnaire des céréales [Pseudaletia unipuncta (Haw)]; S. feltiae Filipjev (du Mexique) pour le vers-gris panaché [Peridroma saucia (Hbn.)]; et S. feltiae (de toutes provenances) pour le vers-gris à dos rouge [Euxoa ochrogaster (Gwen)] et pour l’arpenteuse du printemps [Paleacrita vernata (Peck.)]. Quand les valeurs du LD50 et les taux de parasitisme des hôtes ont été considérés tous les deux, le nématode le plus prometteur pour la lutte biologique de ceux distribués au niveau du sol a été S. feltiae contre la légionnaire bertha.

Type
Articles
Information
The Canadian Entomologist , Volume 123 , Issue 1 , February 1991 , pp. 55 - 61
Copyright
Copyright © Entomological Society of Canada 1991

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