2 edition of Spruce budworm and elk found in the catalog.
Spruce budworm and elk
Pacific Northwest Forest and Range Experiment Station (Portland, Or.).
by Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station in [Portland, Or.]
|Contributions||United States. Forest Service.|
|The Physical Object|
|Pagination||4 p. :|
Western Spruce Budworm Choristoneura freemani Key Wildlife Value: The western spruce budworm contributes to the creation of snags and down wood by severely defoliating true fir and Douglas-fir trees and interacting with other disturbance agents to cause the death of all sizes of host trees. We model the population of the spruce budworm, which is an insect that is the most widely distributed and destructive defoliator of coniferous forests in Western North America. Its population may be modeled by a logistic differential equation with the addition of a .
Breaking the budworm. In the forests of New Brunswick, Nova Scotia, Quebec, and New England, a pest called the spruce budworm has long been enacting a quiet takedown that threatens to destroy the natural landscape and devastate communities dependent on forestry. Most recently causing damage to over four million hectares in Quebec, the budworm. A logging sale proposed on the San Juan National Forest north of Dolores is tapping into the spruce and fir market, but it is also designed to combat the Western spruce budworm infestation.
There was $18 million (over four years) to prevent the spread of spruce budworm; $28 million (over two years) for the National Energy Board to review applications; $10 million (over two years) to improve snow-mobile trails; $3 million (over three years) for the Earth Rangers; and $92 million (overfive years) for the Royal Canadian Mounted Police to chase after illegal cigarettes. The western spruce budworm (Choristoneura occidentalis) is an important native defoliator of interior Douglas-fir.P opulation levels periodically reach outbreak proportions.. Outbreaks have been recorded in British Columbia's interior forests from the early s up to the present. In , the budworm's peak outbreak, more than , ha were under attack, mostly in the southern interior.
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Spruce budworms and relatives are a group of closely related insects in the genus are serious pests of conifers, such as are nearly forty Choristoneura species, and even more subspecies, or forms, with a complexity of variation among populations found throughout much of the United States and Canada, and about again this number in : Insecta.
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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. The western spruce budworm, Choristoneura occidentalis, is the most widely distributed and destructive forest defoliator in western North the Rockies, they most commonly infest Douglas-fir and white fir.
Occasionally, they also attack Engelmann spruce, blue spruce and sub-alpine fir. 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. Beginning in current-year defoliation was quantified using the Fettes Method on a subset of MFS-sampled L2 sites and additional sites in northern Maine.
This method provides a systematic approach to measuring defoliation. It was employed during the last budworm outbreak in Maine, and is. spruce budworm is the most Spruce budworm and elk book pest of spruce and fir forests in North America the larvae are wasteful feeders as they only eat partial needles and then move on to other needles spruce budworm prefers balsam fir, but the name is associated with spruce as white spruce is a more desirable species historically to the forest industry.
Choristoneura fumiferana, the eastern spruce budworm, is a species of moth of the family is also commonly referred to as the spruce budworm. It is one of the most destructive native insects in the northern spruce and fir forests of the eastern United States and range is also the widest of all the budworm species.
Eastern spruce budworm populations can experience Family: Tortricidae. The eastern spruce budworm is believed to be the most damaging forest insect in Maine and North America.
Outbreaks of the insect that kills balsam fir and spruce trees occur every 30 to 60 years. Severe defoliation already has occurred in southern Quebec; we expect to see outbreak populations of SBW in Maine beginning within the next 3 years.
Budworm Impact Calculator. This calculator app was designed to provide woodlot owners and managers with a tool for evaluating the potential stand volume losses resulting from Spruce Budworm infestation.
This calculator is designed to work on a stand basis. Relative to the s Spruce Budworm Infestation When an outbreak of the eastern spruce budworm (Choristoneura fumiferana) (Clem.) began in the boreal forests of eastern Canada and the bordering United States in the late s,changes of immense consequence to the forests and their inhabitants were set in ,the vastness and isolationFile Size: 1MB.
Spruce budworms handbook: predators of the spruce budworm U.S. Department of Agriculture, Forest Service, Cooperative State Research Service, - Predation (Biology) - 77 pages 0 Reviews.
The western spruce budworm, Choristoneura occidentalis Freeman, is the most widely distributed and de-structive defoliator of coniferous for-ests in Western North America. It is one of nearly a dozen Choristoneura species, subspecies, or forms, with a complexity of variation among popula-File Size: KB.
Eastern Spruce Budworm: Management Approaches in Minnesota’s Forests Matthew Russell (Extension Specialist-Forestry) and Michael Albers (Minnesota Department of Natural Resources, retired) June The eastern spruce budworm (Choristoneura fumiferana) is a native forest insect of concern across Minnesota’s coniferous Size: KB.
Predators of the Spruce Budworm by Daniel T. Jennings and Hewlette S. Crawford, Jr.^ Introduction The spruce budworm, Choristoneura fumiferana (Clemens) (Lepidoptera: control, Tortricidae), is the includemost destructive forest insect pest in andeastern North America.
Millions of acres of. Spruce Budworm. Update and Frequently Asked Questions. J Update. The spruce budworm has finished feeding on tree needles for the year in most areas. There are a few larvae still chewing on needles, but most have turned into pupae.
In a week or two, small copper colored budworm moths will emerge and begin laying eggs. In areas. The spruce budworm is a normal part of forest ecosystems in Canada.
However a cyclical surge in population typically occurs every years which can lead to the defoliation of tens of millions. – – Choristoneura fumiferana – Spruce Budworm Moth – (Clemens, ) Photographs are the copyrighted property of each photographer listed.
Contact individual photographers for permission to use for any purpose. Spruce Budworm Pheromone Lures David G. Grimble Abstract Four types of spruce budworm pheromone lures were tested to compare field longevity and efficiency. Biolures with three different pheromone release rates and Silk-PVC lures all caught male budworm moths throughout the moth flight period in proportion to the different release : David G.
Grimble. What is the spruce budworm and where does it come from. The spruce budworm is a native North American insect whose caterpillar measures about 20 to 30 millimeters and is a voracious eater of conifer needles, specifically, those of white, red and black spruce as well as balsam fir.
Balsam fir and white spruce are the preferred host species of the spruce budworm. Red, black and Colorado spruce are also suitable host trees. On occasion, tamarack, pine, and hemlock may be fed upon. In Saskatchewan, spruce budworm feeds on white spruce, balsam fir and to a lesser extent black spruce, as well as the introduced Colorado Size: KB.The Spruce Budworm Model One of the models discussed in this paper is of interest to us because it involves an insect pest found in northern Minnesota pineries, the spruce budworm (Choristoneura fumiferana).
The model was developed in Canada to describe infestations observed there, but is certainly relevant to northern Minnesota.
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