Feeding barriers to reduce damage by pine weevil ( Hylobius abietis )

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Abstract:

The effectiveness of feeding barriers to protect seedlings against damage caused by pine weevil ( Hylobius abietis ) was evaluated in experiments established from 1995 to 1999 in southern Sweden. For this purpose the damage done to containerized seedlings protected by various types of barrier was evaluated, and compared with damage to untreated and insecticide (permethrin)-treated seedlings. Three types of feeding barrier that gave significant protection during the first 3 yrs were recognized: coating on the stem bark, shields with a collar at the top, and shields without a collar. The mean accumulated mortality caused by pine weevil for coatings (47%) and shields without a collar (59%) was significantly higher than the corresponding figure for permethrin treatment (13%), whereas shields with a collar (26%) did not differ significantly from the permethrin treatment in this respect. The highest mortality was found for untreated controls (87%).

Keywords: Conifer; Picea abies; insecticide; reforestation; seedling damage

Document Type: Research Article

DOI: http://dx.doi.org/10.1080/02827580310019554

Affiliations: The Southern Swedish Forest Research Centre Swedish University of Agricultural Sciences SE-230 53 Box 49 Alnarp Sweden

Publication date: February 1, 2004

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