WPB2 - Management of western pine beetle(Dendroctonus brevicomis in old-growth ponderosa pine forests of the West In 1920s old-growth ponderosa

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1 Management of western pine beetle ( Dendroctonus brevicomis ) in old-growth ponderosa pine forests of the West In 1920’s old-growth ponderos a pine were common in the West. As many of these trees reached senescence, the WPB rec ycled them. Infested trees during 1910-20’s period were cut, debarked and the direct sunlight then killed the WPB brood.
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2 WPB-in fested trees were also cut and sprayed with oil sprays. The oil penetrated the bark and killed the brood J.M. Miller F.P. Keen Studies on relationships between fire and WPB infestations
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3 Keen set up experimental plots at Pringle Falls, Oregon A look at what’s going on with ponderosa pine and its interaction with the western pine beetle: ± Defense of the tree by means of its resin system. ± The life history of the WPB Epithelial cells that surround the resin canals Ponderosa pine has Pre- formed resin canals
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4 Read the pressure of the resin within the resin ducts Pressure gauge inserted in tree Severs resin duct Water being pulled
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This note was uploaded on 08/05/2011 for the course ACCT 11212 taught by Professor Davis during the Spring '11 term at York College of Pennsylvania.

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WPB2 - Management of western pine beetle(Dendroctonus brevicomis in old-growth ponderosa pine forests of the West In 1920s old-growth ponderosa

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