1 edition of How to rate spruce-fir vulnerability to budworm in Minnesota found in the catalog.
How to rate spruce-fir vulnerability to budworm in Minnesota
by North Central Forest Experiment Station, Forest Service, U.S. Dept. of Agriculture, NA State & Private Forestry [distributor] in St. Paul, MN, Broomall, PA
Written in English
|Contributions||United States. State and Private Forestry. Northeastern Area, North Central Forest Experiment Station (Saint Paul, Minn.)|
|The Physical Object|
|Pagination||1 folded sheet (4 p.) :|
Western spruce budworm (Choristoneura freemani Razowski; WSBW) is the most significant defoliator of coniferous trees in the western United States. Despite its important influence on Western forests, there are still gaps in our knowledge of WSBW’s impact on fire, and little research has been done on this relationship in high-elevation spruce-fir forests. Severe budworm defoliation on understory trees. Mature western spruce budworm larvae on Douglas-fir branch feeding gregariously The budworm pupates in early to mid July, generally within the webbed foliage. Pupae are about 14 mm long, brown and tapered at the tail end. Adults emerge two weeks later and the cycle begins again.
mature spruce-fir forests and are known for their attraction to and consumption of spruce budworm larvae (Sanders ; Erskine ). In studies of the stomach contents of boreal birds, Mitchell () and Crawford and Jennings () ranked Purple Finches among the most prolific consumers of spruce budworm larvae. Dowden et al. Spruce budworm, Larva of a leaf roller moth (Choristoneura fumiferana), one of the most destructive North American pests. It attacks evergreens, feeding on needles and pollen, and can completely defoliate spruce and related trees, causing much loss for the lumber industry and damaging.
Spruce budworm definition is - a tortricid moth (Choristoneura fumiferana) whose larva feeds on evergreen trees (such as spruce and balsam fir) in the northern U.S. and Canada; also: a related moth (C. occidentalis) of the northwestern U.S. and adjacent Canada. An apparent peak, the statewide inventory estimated million spruce/fir cords of pulpwood quality. By , the inventory had declined 9% to million cords. This data from Maine’s periodic inventory was used in various modeling projections and the bulk of those indicated that a continuing epidemic and harvest levels would.
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Managing spruce budworm in Minnesota's forests The eastern spruce budworm (Choristoneura fumiferana) is a native forest insect of concern across Minnesota’s coniferous forests. Spruce budworm is responsible for defoliating and/or killing vast acreages of balsam fir and spruce annually in Minnesota.
Despite its name, balsam fir trees are most susceptible to budworm while spruces are. Get this from a library. How to rate spruce-fir vulnerability to budworm in Minnesota. [United States. State and Private Forestry. Northeastern Area.; North. Eastern spruce budworm is a native insect and is the most destructive pest of spruce-fir forests in eastern North America.
Caterpillars prefer to feed on balsam fir and white spruce, but minimal feeding damage can occur on black spruce, tamarack, hemlock, and various pines.
budworm population for over 60 years. Budworm outbreaks in Minnesota typically occur in the same area every 25 to 40 years. Estimates from the Department of Natural Resources suggest that annual budworm defoliation avera acres of Minnesota’s forests from through SYMPTOMS Life cycle The eastern spruce budworm is a native.
Eastern spruce budworm: Management approaches in Minnesota’s forests discusses the life cycle and symptoms of spruce budworm and management strategies to maintain healthy and productive spruce-fir forests in Minnesota.
In Minnesota, spruce budworm activity has been observed every year since at least Damage by the spruce budworm, Choristoneura fumiferana (Clemens), on balsam fir, Abies balsamea (L.) Mill., in local ecosystems (site units) of the Ottawa National Forest (western Upper Peninsula of Michigan, U.S.A.) was studied in relation to site factors.
A multi-factor ecological approach was used to distinguish 25 spruce-fir-dominated ecosystems on a variety of different sites, ranging. Development of empirical models to rate spruce--fir stands in Michigan's Upper Peninsula for hazard from the spruce budworm (Lepidoptera: Tortricidae): A case history.
Great Lakes Entomol., Lynch, A.M., Witter, J.A. and Fowler, G.W., b. Spruce budworm information leaf- lets for the Lake States.
A hazard-rating system for. Silvicultural treatments recommended to reduce damage by spruce budworm (SBW; Choristoneura fumiferana Clemens) include reducing balsam fir (Abies balsamea (L.) Mill.) abundance and age and increasing spruce (Picea spp.) and hardwood content.
To evaluate the effect of these measures on forest timber supply, we assessed stand characteristics, disturbance history, and timber supply for an. Mortality of Spruce and Fir in Maine in Due to the Spruce Budworm Outbreak Donald W. Seegrist U.S.
Department of Agriculture, Forest Service, Northeastern Forest Experiment Station, - Balsam fir - 3 pages. Minnesota, and Wisconsin.
These outbreaks last for 15 years and have resulted in the loss of millions of cords of spruce and fir. The spruce budworm limits the longevity of balsam fir dominated and mixed spruce/fir forests in northeastern North America.
The budworm larvae primarily defoliate balsam fir and white spruce. In Atlantic Canada, the spruce budworm problem was noted as early as In locations such as New Brunswick, DDT pesticide was applied to over million hectares from to and to This use of chemical control effectively decreased the spruce mortality rate within this area and prevented significant economic impact.
The Eastern Spruce Budworm Event Monitor is a program that estimates the potential balsam fir mortality from spruce budworm attack within the confines of the Forest Vegetation Simulator (FVS).
This file is based on the work of Batzer, et al () How to rate spruce-fir vulnerability to budworm in Minnesota USDA Forest Service, North Central. The spruce budworm (Choristoneura fumiferana) is one of the most destructive native insects in the northern spruce and fir forests of the Eastern United States and of the time, the number of budworms remains at a low level.
However, every forty years or so, the population of budworms explodes to huge numbers, devastating the forest and destroying many trees, before dropping back. Methods of evaluating forest damage are designed to provide information for detection, control, and preventative management.
In this study the use of small-format aerial photographs to assess spruce budworm, Choristoneurafumiferana (Clemens), damage was evaluated. A procedure was developed to identify spruce–fir stand vulnerability and establish inventory data for silvicultural management.
Western spruce budworm is the most widely distributed forest defoliator in western North America. Budworms have a one-year life cycle and are actually a small moth at full maturity.
Here in the West, there can be severe infestations in healthy Douglas-fir, white fir and spruce. Major outbreaks of the spruce budworm occurred in the Lake States during the 's and 's, but populations declined in the early 's. Spruce budworm populations fluctuate a great deal. The data below shows defoliation in spruce-fir stands for the last 43 years in Minnesota.
The budworm, especially the Spruce Budworm, is very disruptive to ornamental trees, including spruce, fir, Douglas fir, pine, larch, and hemlock.
The budworm attacks the tree by chewing the ends of new tender needles. If infested by mid-July, the ends of the branches look reddish brown and the needles look clustered or webbed together.
Spruce budworm (Choristoneura fumiferana) is the main defoliator of conifer trees in North American boreal forests, affecting extensive areas and causing marked losses of timber supplies.
Spruce budworm Choristoneura fumiferana Order Lepidoptera, Family Tortricidae; tortricids Native pest Host plants: Balsam fir is preferred, but white, red, and black spruces, larch, pine, and western hemlock are also susceptible.
Description: Adult moths are mostly gray, with a wing-span for males of 24 mm and for females of 26 mm. The concept of vulnerability to spruce budworm refers to the probability of tree mortality resulting from a given level of budworm attack.
This paper reviews and analyses available information from the literature on stand vulnerability and timing of mortality during several budworm outbreaks. Spruce Budworm Is. A native moth. Undergoes complete metamorphosis; Adult = moth; Immature = caterpillar (causes damage) Caterpillars eat needles of fir and spruce trees (hosts), eating some within the bud before the needles expand (budworm) Spruce budworm is always present in Maine’s spruce-fir forests.
Usually hard to find.procedures for spruce budworm egg-mass surveys (with reference to the Lake States). Agric. Handb. Washington, D.C.: U.S. Department of Agriculture, Forest Service; 33 p. Objectives: To summarize the methods used to estimate the density of C. fumiferana egg masses in spruce-fir stands and calculate the associated variance of.Spruce budworm (Choristoneura fumiferana) is the main defoliator of conifer trees in North 13 American boreal forests, affecting extensive areas and causing marked losses of timber supplies.