1 edition of Western spruce budworm found in the catalog.
Western spruce budworm
by Dept. of Agriculture, Cooperative State Research Service in [Washington]
Written in English
|Statement||Martha H. Brookes ... [et al.].|
|Series||Technical bulletin / Forest Service -- no. 1694, Technical bulletin (United States. Forest Service) -- no. 1694|
|Contributions||Brookes, Martha H., United States. Cooperative State Research Service., Canada/United States Spruce Budworms Program.|
|LC Classifications||SB945W539 W44 1987|
|The Physical Object|
|Pagination||vi, 98 p. :|
|Number of Pages||98|
PDF | Western spruce budworm (Choristoneura freemani Razowski; WSBW) is the most significant defoliator of coniferous trees in the western United | Find, read and cite all the research you need. 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.
Western Spruce Budworm. Asked J , AM EDT. What measures can I take against an infestation of the Western Spruce Budworm moth? My two acre property and surrounding properties are infested here in Indian Mountain and Stagestop. They are even attacking my bristlecones. This is the first year I have noticed them in the four years I. WESTERN SPRUCE BUDWORM (Choristoneura occidentalis, Freeman) Northcentral, northeast, southeast Washington, and northeast Oregon has experienced several years of an outbreak of western spruce budworm. This insect is a defoliator, with the most common host.
User's guide to the western spruce budworm modeling system / Related Titles. Series: General technical report INT ; By. Crookston, Nicholas L. Intermountain Research Station (Ogden, Utah) Type. Book Material. Published material. Publication info. No exact match for western spruce budworm washington (state). Showing nearby subjects. Browsing Subjects: "Western Slavic languages" to "Westminster Hall (London, England)" .
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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.
The western spruce budworm, Choristoneura occidentalis Freeman, is the most widely distributed and destructive defoliator of coniferous forests in Western North America. It is one of nearly a dozen Choristoneura species, subspecies, or forms found throughout much of the United States and Canada.
For more information on budworm biology, view Forest Insect & Disease Leaflet Western. Figure 3.—Egg mass of the western spruce budworm laid on Douglas-fir needle. Figure 4.— Fourth-stage western spruce budworm larva feeding on Douglas-fir needles. Figure 5.— Female pupa of the western spruce budworm spun among dead needles and larval frass and webbing.
Life History Throughout most of its range, the western spruce budworm File Size: KB. COVID Resources. Reliable information about the coronavirus (COVID) is available from the World Health Organization (current situation, international travel).Numerous and frequently-updated resource results are available from this ’s WebJunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus.
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.
Print book: National government publication: EnglishView all editions and formats: Rating: (not yet rated) 0 with reviews - Be the first. Subjects: Western spruce. Budworm outbreaks may be sustained for 25 years or more.
Host trees: Primarily Douglas-fir, with other tree species such as the true firs, larch and to a lesser degree, spruce, also impacted by the western spruce budworm. Description and life cycle: The western. Spruce Budworms Handbook: Silvicultural Strategies to Reduce Stand and Forest Susceptibility to the Western Spruce Budworm Clinton E.
Carlson and N. William Wulf Format. spruce budworm is the most destructive 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.
Western spruce budworm outbreaks may result in significant modification of susceptible stands by reducing tree density and cover. Losses of existing cover may degrade the quality of habitat available for some wildlife species such as the northern spotted owl, and associated fuel accumulations may increase the risk of catastrophic wildfire.
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.
Inwestern spruce budworm activity was highly apparent in Douglas-fir and grand fir forests of the eastern slope of the Cascade Mountains north of I and across parts of northeastern Washington. Many people noticed defoliated branch tips and tree tops for the first time as an ongoing outbreak spread to include their land or.
Montana Field Guide contains a wealth of information about Montana's diverse species. Search Field Guide Advanced Search. Montana Field Guide Western Spruce Budworm Moth — Choristoneura occidentalis. Montana Field Guide. Montana Natural Heritage Program. Retrieved on April This book is a synthesis of current knowledge about the insect and its hosts.
It summarizes most of the known information on the western spruce budworm and provides background for the recommendations contained in two management books: Managin f^ Trees and Stands Susceptible to Western Spruce Budworm, and.
Western Spruce Budworm and Forest. Western spruce budworm outbreaks are often decades long in the interior West and defoliate extensive areas, which could give a visual impression that trees are dead and a serious fire hazard. However, their impact on fire behavior is poorly understood, and mortality levels are low.
generally known about predators of the spruce budworm. This review is restricted largely to predators of Choristoneura fumiferana, though reference is made to the jack pine budworm (C pinus Freeman) and the western spruce budworm (C occiden- talis Freeman).
We have taken the life-table approach, presenting what is known. 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 spruce budworm, Choristoneura fumiferana, Clem., is the most significant defoliating pest of boreal balsam fir (Abies balsamea (L.) Mill.) and spruce (Picea sp.) in North America.
Historically, spruce budworm outbreaks have been managed via a reactive, foliage protection approach focused on keeping trees alive rather than stopping the outbreak. The role of monoterpenes in resistance of Douglas fir to western spruce budworm defoliation.
Journal of Chemical Ecology Progress 10/01/01 to 09/30/02 Outputs The Western Spruce Budworm and Douglas-fir were used as a model system to investigate nine potential mechanisms of resistance in trees to insect defoliators.
Scientists used. A.E. Hajek, K. van Frankenhuyzen, in Microbial Control of Insect and Mite Pests, Western Spruce Budworm. Western spruce budworm, Choristoneura freemani (formerly Choristoneura occidentalis), occurs west of the Continental Divide where it is most commonly associated with Douglas fir (P.
menziesii).Outbreaks are intermediate to those of the previous two species, causing severe. and yield, western spruce budworm, Choristoneura occidentalis, Tortricidae.
Summary The Budworm Model simulates the population dynamics of the western spruce.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 .Foliage Dynamics and Tree Damage Components of the Western Spruce Budworm Modeling System,General Technical Report, INT 40 pages with illustrations.
[Crookston, N. L.] on *FREE* shipping on qualifying offers. Foliage Dynamics and Tree Damage Components of the Western Spruce Budworm Modeling System,General Technical ReportAuthor: N. L. Crookston.