Potential of Beauveria bassiana (Hyphomycetes: Moniliales) for controlling the white pine weevil, Pissodes strobi (Col., Curculionidae) |
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| Authors: | R Trudel R Lavallée C Guertin C Côté S I Todorova R Alfaro H Kope |
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| Institution: | Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, Sainte-Foy, QC, Canada;;INRS –Institut Armand-Frappier, Laval, QC, Canada;;Natural Resources Canada, Canadian Forest Service, Pacific Forestry Centre, Victoria, BC, Canada |
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| Abstract: | Abstract: Studies were conducted under laboratory conditions to document the potential of Beauveria bassiana conidia applications for controlling the white pine weevil, Pissodes strobi (Peck). A screening test including six B. bassiana isolates allowed us to demonstrate that CFL (Centre de Foresterie des Laurentides) and IP-CPB (Île Perrault-charançon du pin blanc) were the most virulent isolates among the ones tested, with percentages of mortality after 3 weeks of 73% and 85.5%, respectively. These two B. basiana isolates were applied either onto soil or branch sections to compare the effectiveness of these potential control strategies. Greater than 75% mortality was observed within 3 weeks for both modes of application using suspensions of B. bassiana at a concentration of 1.0 × 108 (soil application) and 1.0 × 109 conidia/ml (branch application). The results demonstrate for the first time that B. bassiana is an effective entomopathogen against P. strobi . |
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| Keywords: | Beauveria bassiana Pissodes strobi Norway spruce biological control white pine White pine weevil |
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