Decay in tops killed by Douglas-fir tussock moth in the Blue Mountains by Paul E. Aho

Cover of: Decay in tops killed by Douglas-fir tussock moth in the Blue Mountains | Paul E. Aho

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

Written in English

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  • Douglas-fir tussock moth,
  • Fir -- Diseases and pests -- Oregon,
  • Fir -- Diseases and pests -- Blue Mountains (Or. and Wash.)

Edition Notes

Book details

StatementPaul E. Aho, Boyd E. Wickman, Lee Roe.
SeriesResearch paper PNW -- 250.
ContributionsWickman, Boyd E., Roe, Lee., Pacific Northwest Forest and Range Experiment Station (Portland, Or.), United States. Forest Service.
The Physical Object
Pagination22 p. :
Number of Pages22
ID Numbers
Open LibraryOL17818964M

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Decay in tops killed by Douglas-fir tussock moth in the Blue Mountains. Portland, Or.: Pacific Northwest Forest and Range Experiment Station, U.S. Dept. of Agriculture, Forest Service, Contents Books About: Mawby Green and Ed Feilbert from the French hit Magma by Jean de Letraz Farce Characters: 4 male, 3 female Interior Set It played three years in Paris and five in Hollywood before coming to New York, followed by 10 years coast-to-coast and six in.

Orgyia pseudotsugata (Douglas-fir tussock moth) is a moth of the subfamily Lymantriinae found in western North America. Its population periodically irrupts in cyclical caterpillars feed on the needles of Douglas fir, true fir, and spruce in summer, and Family: Erebidae.

Douglas-fir tussock moth (Orgyia pseudotsugata) is a native defoliator of spruce, Douglas-fir (Pseudotsuga menziesii) and true firs (Abies spp.), though will rarely feed on planted Colorado blue spruce in urban moth is a native species found throughout mixed-conifer forests in the western United States and southern British Columbia.

The Douglas-fir tussock moth is a common and periodically destructive solitary defoliator. Occasionally, localized outbreaks occur on individual or small groups of Douglas-fir or spruce in urban settings both on the coast and in the interior.

Severe defoliation by the tussock moth may result in tree mortality, top-kill or weakened trees, making. Aerial assessment of red spruce & balsam fir condition in the Adirondack region of New York, the Green Mountains of Vermont, the White Mountains of New Hampshire, and the mountains of western Maine, / (Durham, N.H.: Forest Health Protection, U.S.

Dept. of Agriculture, Forest Service, [?]), by Margaret M. Miller-Weeks, United. Douglas-fir tussock moth may be found and location of outbreaks. trees, brush, and buildings, but once an outbreak subsides, finding caterpil-lars is difficult.

Defoliation by the tussock moth kills or top-kills many trees, weakens additional trees that are eventually killed by bark beetles, and retards tree growth for several years. For example. Abstract. The Douglas-fir tussock moth, Orgyia pseudotsugata (McDunnough), is a common defoliator of fir in the interior forests of western North America.

It is one of four western species of Orgyia, but it is the only member of the group that occasionally reaches outbreak numbers while feeding exclusively on conifers.

24 Because of the explosive and destructive nature of its outbreaks, the Cited by: The Douglas-fir tussock moth, Orgyia pseudotsugata (McDunnough), is an important defoliator of spruce, Douglas-fir, true fir and other conifers in the Rocky Mountain region.

Feeding by the larvae can cause complete defoliation of heavily infested trees. Damage usually appears first in the tops of trees and progresses downward, sometimes over several years.

How Does the Douglas-fir Tussock Moth Kill Trees. Douglas-fir tussock moths are defoliators—they eat the leaves off of plants. More precisely, immature caterpillars climb to the top of the tree or building where they hatched, spin a silk web to sail on, float on the wind until they land, and eat any leaves they can find.

th0 Douglas fir tussock moth in the Pacific fior4hwe/t A SEMINAR SEMINAR CHAIRMAN Henry J. Korp Deputy Assistant Administrator for Pesticide Programs U.S.

Environmental Protection Agency PROGRAM COMMITTEE Roger Pierpont, Entomologist Ecological Effects Branch, Criteria and Evaluation Division Office of Pesticide Programs, U.S. Environmental Protection Agency Washington. Grand fir is susceptible to numerous insects.

The most troublesome are western spruce budworm, Douglas-fir tussock moth, western balsam bark beetle, and fir engraver beetle [71,80,]. Timing of, and slash disposal following, thinning are important precautions in avoiding fir engraver attacks. The Douglas-fir tussock moth is a destructive native defoliator of Douglas-fir.

Outbreaks of tussock moth occur every ten to twelve years causing significant damage and mortality to Douglas-fir stands in the interior of the province.

These outbreaks tend to last up to four years before natural controls such as predators, parasites, pathogens. deals in some way with either the Douglas-fir tussock moth, Orgyia pseudotsugata (McDunnough), or a related species. Specifically, publications and 82 unpublished documents make some reference, at least, to the Douglas-fir tussock moth; 55 are concerned with other species in the same genus.

The Douglas-fir tussock moth (Orgyia pseudotsugata McDunnough) defoliated Douglas-fir (Pseudotsuga menziesii var glauca [Beissn.] Franco), in British Columbia from to   Douglas-Fir Tussock Moth “They’re back”. Posted on Janu by MountainHighTree.

Blue Spruce, Douglas Fir and White Fir trees are hosts to this caterpillars feed on new needles, partially eating them and causing the remaining portion of the needles to turn an orangish-brown.

Tussock moth overwinters in the egg. Treatment Options for Douglas-Fir Tussock Moth About Douglas-fir Tussock Moth Douglas-fir tussock moth (Orgyia pseudotsugata) is a defoliator of Douglas-fir, true fir (Abies spp.) and spruce (Engelmann and Colorado blue) trees.

Native to Colorado’s forests, the insect also may impact Colorado blue spruce in urban settings. During an outbreak, trees may be killed in one year because the Douglas-fir tussock moth feeds voraciously on both new and old needles.

Defoliated trees appear reddish in colour and by July, they have taken on a scorched appearance (Fig. The tussock moth has a one-year life cycle and overwinters as eggs (Fig.

Adults appear from. Douglas-Fir Tussock Moth- and Douglas-Fir Beetle-Caused Mortality in a Ponderosa Pine/Douglas-Fir Forest in the Colorado Front Range, USA Article (PDF Available) in Forests 5(12) What is the Douglas-fir tussock moth.

The Douglas fir tussock moth is a native insect in the low-lying, dry belt Douglas-fir regions of southern British Columbia. It is not an introduced species. It feeds primarily on Douglas fir, and occasionally on ponderosa pine and western larch.

Ornamental trees may be affected in. Young tussock moth caterpillars An outbreak lasts for years, during which. serious tree mortality occurs. For more information on Douglas-fir tussock. moth and its control, please contact: The.

Douglas-fir tussock moth is a native insect in the low-lying, dry belt. The Douglas-fir tussock moth (Orgyia pseudotsugata) is an important defoliator of true firs and Douglas-fir in Western North America. Severe tussock moth outbreaks have occurred in British Columbia, Idaho, Washington, Oregon, Nevada, California, Arizona, and New Mexico, but the moth causes notable damage in a much geographic area.

The Douglas-fir tussock moth is a native defoliator of Douglas-fir, true firs (such as grand fir) and spruce. For reasons unknown, a year or two prior to an outbreak of Douglas-fir tussock moth on forested land, we tend to see defoliation of ornamental trees such as blue spruce. Orgyia pseudotsugata (Lymantriidae) the Douglas-fir tussock moth.

Adults: Male is greyish with feathery antennae, hindwings brown,forewings grey. Female in contrast, has tiny rudimentary wings (therefore flightless) and small thread-like antennae.

Larvae: Colourful; 2 - cm long; densely covered with long hairs, 2 "pencils" of long black. Pest Profile Photo Credit: William M. Ciesla, Forest Health Management International, Common name: Douglas-fir tussock moth Scientific name: Orgyia pseudotsugata Order and Family: Lepidoptera: Lymantriidae Size and appearance: Length (mm) Appearance Egg Spherical and white, deposited within in a mass of frothy substance and hairs from the.

Douglas-fir Tussock Moth Orgyia pseudotsugae (McDunnough) Hosts: Douglas-fir, white fir and spruce Symptoms/signs: The Douglas-fir tussock moth caterpillar is grayish with brightly colored tufts of hair and a shiny black head.

There are also two long horns of black hairs behind the head and another at the rear of the body. Insect feedingFile Size: 13MB. - clearwing tussock moth. One of the most devastating creatures on earth. Can completely decimate a lush forest of beautiful Douglas fir pine trees and leave it to rot or burn.

Rating the risk of tussock moth defoliation using aerial photographs. () AH Rating the susceptibility of stands to southern pine beetle attack. () [Initially printed as AH, later corrected to be AH] AH Rearing the Douglas-fir tussock moth. () AH Dear kk, We believe we have correctly identified your Douglas Fir Pitch Moth, Synanthedon novaroensis, from the Clearwing family Sesiidae, another group of wasp mimic moths.

You can see one of the few other images of a live specimen on the Moth Photographers Group website. For more information, see this online article. Forest and Fire in Panhandle Region. Carbon Sequestration. Show Articles on Carbon Sequestration The Douglas-fir tussock moth is a native insect found throughout the range of its Douglas-fir and true fir hosts in the western states and British Columbia.

Wood decay is caused by fungi that use the woody cell wall material as a food source. USDA Forest Service Research Paper PNW EFFECTS OF AERIAL APPLICATION OF DDT FOR TUSSOCK MOTH CONTROL ON NESTLING SURVIVAL OF MOUNTAIN BLUEBIRDS AND HOUSE WRENS JACK WARD THOMAS AND D.

CALVIN McCLUSKEY PACIFIC NORTHWEST FOREST AND RANGE EXPERIMENT STATION U.S. Department of Agriculture Forest Service. This banner text can have markup.

web; books; video; audio; software; images; Toggle navigation. The Douglas-fir tussock moth (Orgyia pseudotsugata) and the western spruce budworm (Choristoneura fumiferana) are the most important insect enemies of Douglas-fir.

Both insects attack trees of all ages at periodic intervals throughout the range of interior Douglas-fir, often resulting in. Downed woody material (DWM) is a key component in forest ecosystems with age, structure, and disturbance described as primary factors that influence DWM dynamics.

In particular, much emphasis is placed on large coarse woody debris (CWD). Fine woody debris (FWD) (less than cm diameter), duff, and litter also contribute to carbon stocks, provide habitat, add to nutrient cycling, and are Author: Andrew D.

Giunta, John D. Shaw. host selection and invasion by the douglas- fir beetle, dendroctonus pseudotsuage hopkins, in coastal douglas-fir forests [rudinsky, j.a.] on *free* shipping on qualifying offers.

host selection and invasion by the douglas- fir beetle, dendroctonus pseudotsuage hopkins, in coastal douglas-fir forestsAuthor: J.A. Rudinsky. Forest Service: A case study of a Douglas-fir tussock moth outbreak and stand conditions 10 years later / (Portland, Or.: Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, ), also by Boyd E.

Wickman and Or.). frozen Douglas-fir needles analyzed for terpenes was subsampled for phenolic analysis. Before analysis, alder and Douglas-fir foliage were oven-dried for 24 hr at 60°C, ground to pass a mesh screen, and redried overni ght. Phenols were extracted from a mg subsample in 8 ml (Douglas-fir) or 10 ml (alder) Me0H-H,0 () on a shaker for 1 hr.

It occurs in subalpine zones with Engelmann spruce and blue spruce in the Douglas fir series and ponderosa pine habitat types. In southern Colorado and northern New Mexico, white fir is a co-climax species with Douglas fir and is associated with blue spruce, limber pine, ponderosa pine, Engelmann spruce, subalpine fir, quaking aspen, and Rocky.


The tussock-moth on horse-chestnuts, The promothea moth on lilac bushes, The cabbage-butterfly on cabbage or mustard plants, The red-spotted purple, banded purple, and viceroy butterfly larvæ on willow and alder, Cocoons of tussock-moth and tiger-moth under bark, logs, and rubbish in early autumn.

The Colorado blue spruce (Picea parryana or Picea pungens) which is commonly used as an ornamental tree on lawns and in parks, can be told from the other spruces by its pale-blue or sage-green color and its sharp-pointed, coarse-feeling twigs.

Its small size and sharp-pointed conical form are also characteristic.Interior Douglas-fir is a prevalent forest type throughout the central Rocky Mountains. Past management actions, specifically fire suppression, have led to an expansion of this forest type.

Although Douglas-fir forests cover a broad geographic range, few studies have described the interactive effects of various disturbance agents on forest health by: 4.Following disturbance, Douglas-fir and noble fir become established. Pacific silver fir is the last to invade, sometimes to years after the disturbance.

After extensive forest fires, Pacific silver fir may not become important among the large trees for to years [61,69].

Eventually, Douglas-fir and noble fir fail to reproduce.

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