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2 edition of A method for sampling western spruce budworm pupae found in the catalog.

A method for sampling western spruce budworm pupae

A method for sampling western spruce budworm pupae

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  • 37 Currently reading

Published by U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station in [Portland, Or.?] .
Written in English

    Subjects:
  • Western spruce budworm

  • Edition Notes

    StatementNilima Srivastava ... [et al.]
    SeriesResearch note PNW -- 372
    ContributionsSrivastava, Nilima, Pacific Northwest Forest and Range Experiment Station (Portland, Or.)
    The Physical Object
    Pagination6 p. ;
    ID Numbers
    Open LibraryOL14219029M

    outbreaks of western spruce budworm (Choristoneura occidentalis Freeman) (Mason and others 1 , Waring and others , Wickman and others ). In this repli- cated experiment, grand fir (Abies grandis (Dougl. ex D. Don) Lindl.) stands infested with western spruce budworm were fertilized with urea at kilograms of nitrogen (N) per hectare. The eastern spruce budworm is one of the most destructive insects of fir and spruce forests throughout Canada and the eastern United States. [14] For biological methods, birds are important in controlling populations of the eastern spruce budworm below outbreak levels, [15] and the parasitic wasp Trichogramma minutum was investigated as a.

    hosts of budworm as dominant or co-dominant tree spe-cies. Budworm populations were high at all sites (peak or declining phase of outbreaks), as indicated by time series of egg mass densities (Royama et al., ). We included data only for sites and sampling protocols for which bud-worm had been collected for ≥8 days. We included light. 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.

    19, to reduce damage and tree mortality caused by western spruce budworm. Forty-eight BIU of B.t. was sprayed on foliage using a fixed -winged aircraft. Spraying for budworm is often conducted ea rlier in the year; however, it was delayed due to a wet, cool spring in sampling of larval spruce ' budworm populations. Sp. Twenty-five clusters of three trees each (a total of 75 trees) of • Douglas-fir or spruce were distributed throughout each block. Criteria for tree selection were that trees be 30 to 40 feet (9 to 12 m) tall, open grown, full crown, and accessible.


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A method for sampling western spruce budworm pupae Download PDF EPUB FB2

Get this from a library. A method for sampling western spruce budworm pupae. [Nilima Srivastava; Pacific Northwest Forest and Range Experiment Station (Portland, Or.);].

A Method for Sampling Western Spruce Budworm Pupae Nilima Srivastava, Roy C. Beckwith, Robert W. Campbell, and Torolf R. Torgersen Abstract Introduction Pupal density of western spruce budworm, Choristoneura occidental is Freeman, can be accurately estimated from cm branch tips.

Density on tips was representative of densities on entire : Nilima Srivastava, Roy C. Beckwith, Robert W. Campbell, Torolf R. Torgersen. Sampling western spruce budworm by counting larvae on lower crown branches.

Sampling western spruce budworm larvae by frequency of occurrence on lower crown branches. Monitoring larval populations of the Douglas-fir tussock moth and the western spruce budworm on permanent plots: sampling methods and statistical properties of dataAuthor: Nilima Srivastava, Roy C.

Beckwith, Robert W. Campbell, Torolf R. Torgersen. A method for sampling western spruce budworm pupae. Res. Note PNW-RN Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station 6 p; Keywords: Population sampling, insect surveys, sampling methods, insect populations, western spruce budworm, Choristoneura occidentalis; Posted Date Author: Nilima Srivastava, Roy C.

Beckwith, Robert W. Campbell, Torolf R. Torgersen. A method for sampling western spruce budworm pupae. Res. Note PNW Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station; 6 p. Objective: To validate a method of stratified sampling for C.

occidentalis pupae on branch tips. budworm in the East and the western spruce budworm in A method for sampling western spruce budworm pupae book West. The objective of CANUSA was to design and Design of Sampling Methods 6 Collecting Techniques 7 Either the egg, larva, or pupa of the budworm may be attacked, depending upon the species of.

The book describes and interprets the educational system of “patriarchal - community education”, which was established in western and northern Macedonia in the period of the Ottoman reforms. 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. Western spruce budworm pupa The moths are about 13 mm. Spruce budworm sampling.

Four balsam fir trees were randomly selected from the dominant or co-dominant crown layer (Smith et al., ) in each plot and were sampled at the peak of each of four spruce budworm developmental stages, each year from to L3-L4 (sampled between the peaks of the third and fourth instar), L6, pupae (including exuviae, as an estimate of the.

Sampling methods and population prediction models are needed to provide forest managers with the capability of monitoring and predicting populations of the insect. I sampled eggs, larvae, pupae and adults of Lambdina fiscellaria lugubrosa at various locations in.

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.

Laboratory studies showed that elm leaf beetle, Pyrrhalta luteola (Müller), larvae and pupae were susceptible to the nematode Neoaplectana carpocapsae Weiser; adults were less likely to be infected because of their dispersal ability. Spruce budworm, Choristoneura occidentalis Freeman, larvae were susceptible to the nematode in the laboratory.

Field application of the nematode in 2% aqueous. Aeschlimann JP () Sampling methods and construction of life tables for Weekman GT () A method of recovering eggs of the western corn rootworm from soil. J Econ Entomol – () The development of sampling techniques for forest insect de-foliators, with particular reference to the spruce budworm.

Can J Zool Sampling western spruce budworm by counting larvae on lower crown branches. USDA Forest Service Research Note PNW-RN 8 pages. - New Window; Mason, R.

R.; Paul, H. Monitoring larval populations of the Douglas-fir tussock moth and the western spruce budworm on permanent plots: sampling methods and statistical properties of data. Gen. Growing Healthy Forests in Washington From helping public and private landowners care for their trees to leading the state’s efforts to reduce uncharacteristically severe wildfires, the Forest Health and Resiliency Division works to improve the health of Washington’s forests.

Growing healthy forests means using science to understand the needs of trees, bugs, fungi, fire. (spruce budmoth) within the crown of white spruce (spruce budmoth eggs and larvae.

Kemp et al. () also developed a degree-day model but with direct observations from field populations of western spruce budworm. Their model provided a good fit for each life stage but each. Books. An illustration of two cells of a film strip. Video A method for sampling western spruce budworm pupae.

by Srivastava, Caption title Topics: Western spruce budworm, Western spruce budworm. U.S. Forest Service Pacific Northwest Region. 75 A method for sampling yeasts and bacteria in sound wood.

Print book: National government publication: EnglishView all editions and formats: Rating: (not yet rated) 0 with reviews - Be the first. Subjects: Western spruce budworm. Microcomputers and forestry. Insect populations -- Measurement -- Statistical methods.

View all subjects; More like this: Similar Items. The effect of removing lodgepole pine (Pinus contorta Dougl. ex Loud.) and retaining Douglas-fir (Pseudotsuga menziesii (Mirb.)Franco) to reduce the risk of disturbance from mountain pine beetle (Dendroctonus ponderosae Hopk.) in mixed conifer stands in southern British Columbia, Canada, on population processes influencing outbreaks of western spruce budworm (Choristoneura occidentalis.

Featuring a broad range of topics, Sampling, Third Edition serves as a valuable reference on useful sampling and estimation methods for researchers in various fields of study, including biostatistics, ecology, and the health sciences. The book is also ideal for courses on statistical sampling at the upper-undergraduate and graduate levels.Effects of Aerial Application of Chemical Insecticides on Spruce Budworm Parasites Harris, J.W.E.

-Egg-sampling for western spruce bud- vi Pupae Adult Apanteles Gfrpta Cocoon Adult Cocoon Adult 63 I 0 0 0 71 5 0 0 0 48 40 71 29 0.The experiment ran from spring to autumn in and in a greenhouse at the University of Quebec at Chicoutimi, Québec, Canada (48°25′ N, 71°04′ W, m above sea level).

The study used three conifer species that are spruce budworm hosts: white spruce (P. glauca), black spruce (P. mariana) and balsam fir (A. balsamea).

Individuals.