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Title: Scleroderris Canker of Northern Conifers
Author: Skilling, Darroll D.; O'Brien, James T.; Bell, James A.;
Source: Forest Insect & Disease Leaflet 130. [Broomall, PA:] U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
Publication Series: Forest Insect and Disease Leaflet (FIDL)
Description: Scleroderris canker, caused by the fungus Gremmeniella abietina-Scleroderris lagerbergii (Lagerb.) Morelet, has caused extensive mortality in conifer plantations and forest nurseries in the northeast and north central United States and eastern Canada. Two strains of the fungus are known in North America. The Lake States strain, present throughout northeastern North America, attacks young trees but has caused only minor injury to trees over 2 m (6 ft) tall. The second strain, called the European strain, is found in New York and Vermont, where it is causing major mortality in pole-size red and Scots pine plantations in the northern part of these States.
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Skilling, Darroll D.; O''Brien, James T.; Bell, James A. 1979. Scleroderris Canker of Northern Conifers. Forest Insect & Disease Leaflet 130. [Broomall, PA:] U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
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