Many pests and other stresses affect maple trees growing in a sugarbush. Some pests can markedly reduce sap quantity; others, although conspicuous, are not important. Stresses can result from activities by people and from natural phenomena. Recognizing problems and understanding the factors that…
Keywords: insects, diseases, sugar maple, acer saccharum, air pollution, tapping maple syrup, northern hardwoods, maple decline, stand management
Source: Gen. Tech. Rep. NE-129. Broomall, PA: U.S. Department of Agriculture, Forest Service, Northeastern Forest Experiment Station. 55 p.
Nonnative organisms that cause a major change to native ecosystems-once called foreign species, biological invasions, alien invasives, exotics, or biohazards–are now generally referred to as invasive species or invasives. invasive species of insects, fungi, plants, fish, and other organisms present…
Keywords: Biological invasions, forest ecology, nonindigenous pests, introduced organisms, pest introduction, forests and forestry, diseases, pests, invasive species
Source: McGraw-Hill yearbook of science & technology, 2006. New York : McGraw-Hill, c2006: Pages 177-180.
Information about the biology, ecology, and management of quaking aspen on the mountains and plateaus of the interior western United States, and to a lesser extent, Canada, is summarized and discussed. The biology of aspen as a tree species, community relationships in the aspen ecosystem,…
Keywords: Populus tremuloides, ecology, forest management, silvics, silviculture, wildlife habitat, diseases, insects, fire, watershed management, forest products
Source: USDA Forest Service General Technical Report RM-119. Rocky Mountain Forest and Range Experiment Station, Fort Collins, Colo. 283 p.
The scope and intensity of disturbance by such agents as fire, insects, diseases, air pollution, and weather in Pacific Northwest forests suggests that forest health has declined in recent years in many areas. The most significant disturbances and causes of tree mortality or decline in Oregon and…
Keywords: air pollution, diseases, disturbance, fire, forest health monitoring, insects, vegetation change, weather damage
Source: Gen. Tech. Rep. PNW-GTR-381. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 121 p
Natural disturbance in western U.S.A. forest ecosystems is related to forest succession, growth, and structural development. Natural disturbance may be biotic (insects and diseases) or abiotic (fire, wind, avalanche, etc.). Natural disturbances are more appropriately thought of as natural processes…
Keywords: forest health, forest ecology, insects, diseases, forest fires, ecological disturbance, forest management, development
Source: In: L. G. Eskew, comp. Forest health through silviculture: proceedings of the 1995 National Silviculture Workshop, Mescalero, New Mexico, May 8-11, 1995. Gen. Tech. Rep. RM-GTR-267. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station: 26-36
Over 360 exotic forest insects and about 20 exotic diseases have become established in the U.S. Many of these organisms have become serious pests, causing great economic impacts and irreversible ecological harm. Despite efforts to exclude exotic species, forest insects and disease organisms…
Keywords: forest health, forest pests, insect pests, exotic species, diseases, pest control
Source: In: L. G. Eskew, comp. Forest health through silviculture: proceedings of the 1995 National Silviculture Workshop, Mescalero, New Mexico, May 8-11, 1995. Gen. Tech. Rep. RM-GTR-267. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station: 105-113
An often ignored tool to improve forest health is the application of genetics-Tree improvement programs in the Inland West utilize genetic principles to develop-seed transfer guidelines to avoid the problems associated with off-site plantings and to improve characteristics in conifers related to…
Keywords: forest health, genetics, insects, diseases, selective breeding, seed transfer
Source: In: L.G. Eskew, comp. Forest health through silviculture: proceedings of the 1995 National Silviculture Workshop, Mescalero, New Mexico, May 8-11, 1995. Gen. Tech. Rep. RM-GTR-267. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station: 200-207
Part of the diversity of a forest is the variety of agents that can kill trees. These agents differ in the nature, magnitude, and patterns of their impacts on forest resources. Diseases, insect pests, and other small-scale disturbances are commonly assessed on the basis of their impacts on timber…
Keywords: non-timber forest resources, diseases, insect pests, small-scale disturbances, tree mortality
Source: In: Lundquist, J.E.; Hamelin, R.C., eds. 2004. From molecules to ecosystems - Forest pathology in the era of genes and landscapes. St. Paul , MN: American Phytopathological Society Press. p. 105-112
Arborists are often challenged to identify internal structural defects hidden from view within tree trunks. This article reports the results of a study using a trunk inspection protocol combining visual observation, single-path stress wave testing, acoustic tomography, and resistance microdrilling…
Keywords: Acoustic tomography, crack, decay, hazard tree, resistance microdrilling, resistograph, risk assessment, stress wave, wood, biodegradation, deterioration, diseases, pests, oak, grading, red oak, mechanical properties, acoustic properties, wood quality, drilling, boring, microdrilling, wood defects, nondestructive testing, Capitol Park (Madison, WI), acoustic testing, resistance to decay, oak decay, logs, standing trees
Source: Arboriculture & urban forestry. Vol. 34, no. 1 (Jan. 2008): Pages 1-4.
Because of the potential risk associated with moving firewood infested with emerald ash borer, the interstate movement of all hardwood firewood is currently restricted under Federal quarantine. Communities and firewood producers are now faced with decisions on how to treat firewood for interstate…
Keywords: Ash, diseases, pests, emerald ash borer, control, North America, fuelwood, sanitation, heat treatment, firewood, dry heat, wet heat
Source: General Technical Report FPL-GTR-187. Madison, WI: U.S. Department of Agriculture, Forest Service, Forest Products Laboratory. 29 pages.