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Title: Sirococcus Shoot Blight
Author: Nicholls, Thomas H.; Robbins, Kathryn;
Source: Forest Insect & Disease Leaflet 166. [Broomall, PA:] U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
Publication Series: Forest Insect and Disease Leaflet (FIDL)
Description: Sirococcus shoot blight, caused by the fungus Sirococcus strobilinus Preuss, affects conifers in the Northern United States and southern Canada. The fungus infects the new shoots; diseased seedlings and saplings are especially affected. In the United States, sirococcus shoot blight has become increasingly widespread since the early 1970's. When favorable conditions for infection have occurred, the incidence of tree mortality and shoot death has risen steadily in several areas. Tree mortality in some Wisconsin red pine plantations, for example, increased from 19 to 67 percent from 1972 to 1976.
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Nicholls, Thomas H.; Robbins, Kathryn 1984. Sirococcus Shoot Blight. Forest Insect & Disease Leaflet 166. [Broomall, PA:] U.S. Dept. of Agriculture, Forest Service, Northern Area State & Private Forestry
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