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POSSIBILITY OF USING WHITE AND GREEN MUSCARDINE FUNGI FOR CONTROL OF CONE AND SEED INSECT PESTS

Published online by Cambridge University Press:  31 May 2012

M. I. Timonin ,
W. H. Fogal  and
S. M. Lopushanski
M. I. Timonin
Affiliation:
Biology Department, Carleton University, Ottawa, Ontario K1S 5B6
W. H. Fogal
Affiliation:
Petawawa National Forestry Institute, Canadian Forestry Service, Chalk River, Ontario, K0J 1J0
S. M. Lopushanski
Affiliation:
Petawawa National Forestry Institute, Canadian Forestry Service, Chalk River, Ontario, K0J 1J0
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Abstract

Preconditioning of isolates of Beauveria bassiana (Bals.) Vuill. and Metarrhizium anisopliae (Metch.) Sor. with specific insects increases their virulence. An isolate of B. bassiana used two years previously in pathogenicity tests against spruce budworm, Choristoneura fumiferana Clem., required only one passage through this insect to attain 100% mortality in 48 h of incubation, whereas an isolate of M. anisopliae that was not previously used against this insect required four passages to attain the same degree of virulence as B. bassiana. Larvae of Laspeyresia youngana (Kft.), Dasineura rachiphaga Tripp, and Dasineura canadensis Felt were very susceptible to both fungi and 100% mortality was obtained in less than 48 h of incubation. Larvae of Lasiomma anthracina Czerny were much less susceptible. Puparia of both genera of Diptera were more resistant than larvae and required longer incubation to obtain 100% mortality.

Résumé

Préconditionnement des isolés du Beauveria bassiana (Bals.) Vuill. et Metarrhizium anisoplaie (Metch.) Sor. avec insectes spécifiques augmente leur virulence. Un isolé de B. bassiana employé deux ans auparavant dans les tests pathogénicites contre la tordeuse des bourgeons de l’épinette Choristoneura fumiferana Clem. exigeait un seul passage à travers cet insecte pour obtenir une mortalité de 100% dans 48 heures d’incubation, tandis qu’un isolé de M. anisopliae qui n’était pas employé auparavant contre cet insecte a exigé quatre passages pour obtenir le même degré de virulence que B. bassiana. Les larves du Laspeyresia youngana (Kft.), Dasineura rachiphaga Tripp et Dasineura canadensis Felt étaient très susceptibles aux deux fongus et une mortalité de 100% a été obtenu dans moins de 48 heures d’incubation. Les larves du Lasiomma anthracina Czerny étaient encore moins susceptibles. Les puparia des deux genres du Diptera étaient plus résistant que les larves et exigeaient une incubation prolongée pour obtenir une mortalité de 100%.

Type
Articles
Information
The Canadian Entomologist , Volume 112 , Issue 8 , 01 August 1980 , pp. 849 - 854
Copyright
Copyright © Entomological Society of Canada 1980

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