Instar development of the Douglas-fir tussock moth in relation to field temperatures

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U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Research Station , [Portland, Or.] (333 S.W. First Avenue, P.O. Box 3890, Portland 97208-3890)
Douglas-fir tussock moth -- Reproduction -- Seasonal variations -- Idaho, Reprodu
StatementRoy C. Beckwith, David G. Grimble and Julie C. Weatherby
SeriesResearch note PNW -- RN-512, Research note PNW -- 512
ContributionsGrimble, David G, Weatherby, Julie C, Pacific Northwest Research Station (Portland, Or.)
The Physical Object
Pagination4, [1] p.
ID Numbers
Open LibraryOL13616876M

Title. Instar development of the Douglas-fir tussock moth in relation to field temperatures / Related Titles. Series: Research note PNW ; By. Beckwith, R.

Grimble, David G. Weatherby, Julie C. Pacific Northwest Research Station (Portland, Or.) Type. Get this from a library. Instar development of the Douglas-fir tussock moth in relation to field temperatures. [R C Beckwith; David G Grimble; Julie C Weatherby; Pacific Northwest Research Station (Portland, Or.)].

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 moths are on the wing from July or August to : Erebidae.

Hosts: Douglas-fir, white fir and spruce Figure 8. Adult male (left) and femail (right) Douglas-fir moth. Symptoms/Signs: The caterpillar of the Douglas-fir tussock moth is grayish with brightly colored tufts of hair and a shiny black are also two long horns of black hairs behind the head and another at the rear of the body.

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.

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 user first specifies the target species, either Douglas-fir tussock moth (DFTM) or western spruce budworm (WSBW). 2 Genetic Predisposition of Population Responses of populations of both western spruce bud-worm and Douglas-fir tussock moth to a given chemical may vary widely R(obertson and others ; Stock and Robertson).

Surviving stands are invariably in a weakened state, and very susceptible to other insects (such as the Douglas-Fir Beetle) and onally, about 20% of people and animals are allergic to Douglas-Fir Tussock Moth hairs. These hairs are present on the larvae, the cast larval skins, the egg masses, the cocoons, and the female moth.

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.

Description Instar development of the Douglas-fir tussock moth in relation to field temperatures EPUB

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.

Successful management of the Douglas-fir tussock moth depends on carefully monitoring populations within high-hazard stands during the non-outbreak and building phases.

Details Instar development of the Douglas-fir tussock moth in relation to field temperatures PDF

Once an outbreak begins, viable treatment options decrease significantly. Immature Douglas-fir tussock moth larvae clearly infected with the naturally occurring pathogen nuclear polyhedrosis virus, or NPV.

This is very common in tussock moth populations, a naturally occurring disease that works to keep tussock moth numbers in check. A mature Douglas-fir tussock moth larvae with brown, feeding-damaged needles nearby.

Instar development of the Douglas-fir tussock moth in relation to field temperatures / View Metadata By: Beckwith, R. - Grimble, David G. - Weatherby, Julie C. - Pacific Northwest Research Station (Portland, Or.).

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. Douglas-fir Tussock Moth Biology and Life Cycle (PDF) Douglas-fir Tussock Moth and Tussockosis (PDF) Douglas-fir Tussock Moth Treatment and Control In My Backyard (PDF) Douglas-fir Tussock Moth NPV Virus Information Sheet (PDF) History of Douglas-fir Tussock Moth in South-East BC (PDF) DFTM Treatment Maps; Back to Douglas-fir Tussock Moth.

Adult Douglas-fir tussock moth male. He is a dull, brown-gray, ordinary looking moth. Table 1. Total Volume Decline l of Tree Mortality with [no treatment) Natural Degree of defoliation Estimate Class 1, Intensive Class II, Moderate Class III, Light Class IV, None OSU low1 Percent 84 84 Percent 16 19 34 Percent 0 Percent 0.

Books Advanced Search New Releases Amazon Charts Best Sellers & More The New York Times® Best Sellers Children's Books Textbooks Textbook Rentals Sell Us Your Books Best Books of the Month Kindle eBooks Advanced. Douglas-fir, white fir, and grand fir are all equally acceptable.

In the south (California, Nevada, Arizona, and Figure 1. -- Distrubution of host type where 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. Douglas-fir Tussock Moth Control by the Homeowner The Douglas-fir tussock moth, Orgyia pseuclot-sugata, is one of the most injurious insect pests of Douglas-fir and true firs found in the West.

Out-breaks may develop explosively and when they do, the caterpillars will attack less preferred species such as pine, larch, spruce, and other species.

the Douglas-fir tussock moth for which I am thankful. Richard Nason of the Range and Wildlife Habitat Laboratory in La Grande, Oregon, was very helpful in giving me access to unpublished data on the Douglas-fir tussock moth. I am grateful to him and his colleague Dr. T.R. Torgersen for his hospitality.

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- 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) ABSTRACT The Douglas-fir tussock moth is a native defoliator which periodically reaches outbreak proportions in western North America, causing economically important damage to its primary host, the interior Douglas-fir.

The research and development of a management system for this defoliator over the past 15 years is reviewed in detail. of Douglas-fir tussock moth into new locations around the state sometimes result from humans incidentally moving construction materials or other items that have attached egg masses.

Life History and Habits Douglas-fir tussock moth spends the winter as an egg within the egg mass. Eggs hatch in the spring, often in late May, typically following. 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. Douglas-fir tussock moth: sex pheromone identification and synthesis.

Smith RG, Daterman GE, Daves GD Jr. The sex pheromone of the Douglass-fir tussock moth Orgyia pseudotsugata (McDunnough) has been isolated and identified as (Z)heneicosenone. This compound and its E isomer have been synthesized and are highly potent in laboratory Cited by:   Outbreaks of the Douglas-fir tussock moth, Orgyia pseudotsugata (McDunnough), have recurred periodically, at 7- to year intervals, since the first recorded observation in in Chase, British Columbia, Canada.

Anderson and May () hypothesized that microparasites are responsible for the periodic population fluctuations of some defoliating by:   Abstract. The long-term persistence of the nuclear polyhedrosis virus of the Douglas-fir tussock moth, Orgyia pseudotsugata (McDunnough), in forest soil has been established by bioassaying soil and duff samples from an area in which the last tussock moth outbreak took place in – Samples were taken from beneath each of 75 white fir, Abies Cited by: Orgyia pseudotsugata Pest description and crop damage The adult moth flies during the day and is brown to gray, about 1 inch across.

Mature Douglas-fir (Pseudotsuga)-Douglas-fir tussock moth | Pacific Northwest Pest Management Handbooks. Significant impacts by the Tussock Moth have been reported on Cheyenne Mtn by Colorado Springs, Near Perry Park, the Rampart Range, and northwest of Boulder.

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This is not to be confused with the western spruce budworm, although both are defoliators of spruce, Douglas fir and white fir. For more information, see the CSU Extension Sheet on Tussock. For control of Douglas Fir Tussock Moths: In landscape plantings, pyrethroids such as permethrin (Astro), cyfluthrin (Tempo), bifenthrin (Talstar, Onyx) and lambda-cyhalothrin (Scimitar) are effective against Douglas-fir tussock moth caterpillars.Douglas-fir tussock moth caterpillars are quite hairy with distinct tufts of hairs on their back.

Needle loss is often concentrated at the top of the tree; insect evidence can be detected year round (eggs in winter, caterpillars in spring, adults flying in late summer).The pine tussock moth is normally a relatively uncommon solitary defoliator.

This species however occasionally goes into outbreak on individual open grown trees in urban settings in British Columbia.

One outbreak cover ha of young ponderosa pine was recorded in Montana in Mature larva up to 35 mm long. Head, unmarked black.