File:Insect and disease conditions in the United States, 1979-83 - what else is growing in our forests? (1985) (20385423650).jpg

Title: Insect and disease conditions in the United States, 1979-83 : what else is growing in our forests?
Identifier: CAT87881361 (find matches)
Year: 1985 (1980s)
Authors: Loomis, Robert C; Tucker, Susan; Hofacker, Thomas H; United States. State and Private Forestry; United States. Forest Pest Management
Subjects: Forest insects United States; Trees Diseases and pests United States; Plants Disease and pest resistance
Publisher: (Washington, D. C. ) : The Service
Contributing Library: U.S. Department of Agriculture, National Agricultural Library
Digitizing Sponsor: U.S. Department of Agriculture, National Agricultural Library

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F-705661 stressed trees, that is, trees weakened by factors such as drought, defoliation, root damage, or other pests. Its effects depend upon the geographic location, host species, age of the host, and stand and site conditions. The disease can kill a tree rapidly or can cause a gradual decline through associated root and butt decay. • Red-brown butt rot is com- mon throughout the West, especially in Douglas-fir. The causal fungus primarily decays the heartwood of roots and the lower trunk (fig. 1), often causing the tree to be toppled by the wind. • Laminated root rot affects Douglas-fir, true firs, mountain hemlock, and western redcedar in the Pacific Northwest. The fungus that causes the root rot survives for decades in roots and stumps. Consequently, any new growth also becomes infected; thus, the level of inoculum on a site increases. • Littleleaf disease affects shortleaf and loblolly pines in the Piedmont area of the South. The disease results from the interac-
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