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Stimulating effect of bark polar fraction from the terminal leader of Norway spruce, Picea abies, on white pine weevil, Pissodes strobi, feeding and oviposition

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The objective of the study was to demonstrate the importance of bark polar fraction from Norway spruce [Picea abies (L.) Karst.] terminal leaders on the feeding activity and oviposition process of the female white pine weevil, Pissodes strobi (Peck). The bark polar fraction was extracted with a ternary solvent [chloroform, methanol and water (12 : 5 : 3)]. This extracted fraction was added, at different concentrations, to an artificial diet on which mated female white pine weevils could feed and oviposit. The bark polar fraction of Norway spruce terminal leaders promoted white pine weevil oviposition compared with untreated artificial diet. The results of this study contributed to the development of an efficient artificial rearing substrate required to better understand the interactions between white pine weevil and its host plants. The importance of more specific compounds found in the polar fraction could eventually help produce more resistant trees.
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Keywords: Norway spruce; Picea abies; Pissodes strobi; artificial diet; bark polar fraction; bark powder; oviposition; terminal leader; white pine weevil

Document Type: Research Article

Affiliations: 1: Natural Resources Canada, Canadian Forest Service, Laurentian Forestry Centre, 1055 du P.E.P.S., PO Box 10380, Stn. Sainte-Foy, Québec, QC, Canada G1V 4C7 2: Centre de Recherche en Biologie Forestière, Université Laval, QC, Canada G1K 7P4

Publication date: 01 June 2006

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