TAILIEUCHUNG - Báo cáo lâm nghiệp:"Effects of field vegetation control on pine weevil (Hylobius abietis) damage to newly planted Norway spruce seedlings"

Tuyển tập các báo cáo nghiên cứu về sinh học được đăng trên tạp chí lâm nghiệp đề tài:"Effects of field vegetation control on pine weevil (Hylobius abietis) damage to newly planted Norway spruce seedlings" | Ann. For. Sci. 60 2003 667-671 INRA EDP Sciences 2004 DOI forest 2003059 667 Original article Effects of field vegetation control on pine weevil Hylobius abietis damage to newly planted Norway spruce seedlings Goran ỎRLANDERa Goran NORDLANDERb a School of Industrial Engineering Vaxjo University 351 95 Vaxjo Sweden b Department of Entomology Swedish University of Agricultural Sciences PO Box 7044 750 07 Uppsala Sweden Received 24 June 2002 accepted 17 February 2003 Abstract - We investigated interactions between field vegetation and seedling damage caused by a major insect pest the pine weevil Hylobius abietis L. in an experiment established on a clear-cut area in southern Sweden. Scarification was performed on three occasions May and August 1998 May 1999 and Norway spruce seedlings were planted on three occasions August 1998 May and August 1999 . To keep the mineral soil open field vegetation and mosses were removed using herbicides. In total seven different soil treatments including planting in untreated soil were included. Damage to seedlings by the pine weevil and vegetation around each seedling was monitored 1-2 months after each planting. Fresh scarification significantly reduced pine weevil damage and increased seedling survival. However the open mineral soil was gradually colonised by hairy grass Deschampsia flexuosa and the damage-suppressing effect of scarification was reduced with time. Herbicide treatment removed field vegetation and reduced pine weevil damage significantly especially when there was a long period between scarification and planting. We conclude that vegetation in-growth was the main factor decreasing the effect of scarification on weevil damage. Hylobius abietis Picea abies seedling damage scarification field vegetation Résumé - Effets du contrôle de la vegetation basse sur l importance des dégâts dus à Hylobius abietis sur des plants d epicea commun venant d etre plantés. Nous avons étudié les interactions entre vegetation basse

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