Last edited by Kazirr
Thursday, February 13, 2020 | History

2 edition of Douglas-fir tussock moth handbook found in the catalog.

Douglas-fir tussock moth handbook

R. C Beckwith

Douglas-fir tussock moth handbook

larval instars of the Douglas-fir tussock moth

by R. C Beckwith

  • 82 Want to read
  • 36 Currently reading

Published by Dept. of Agriculture : for sale by the Supt. of Docs., U.S. Govt. Print. Off. in [Washington] .
Written in English

    Subjects:
  • Douglas-fir tussock moth,
  • Larvae

  • Edition Notes

    Other titlesLarval instars of the Douglas-fir tussock moth
    Statementby R. C. Beckwith
    SeriesAgriculture handbook ; no. 536, Agriculture handbook (United States. Dept. of Agriculture) -- no. 536
    ContributionsUnited States. Dept. of Agriculture
    The Physical Object
    Pagination15 p. :
    Number of Pages15
    ID Numbers
    Open LibraryOL13602669M

    The best-known member of this family is the beautiful but highly detrimental Gypsy Moth which is not native to North America. They focus on mating and laying eggs, after which they die within days. Moths emerge from Douglas-fir tussock moth handbook book in late summer or early fall, when they mate and deposit their eggs in masses. 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. Cocoons usually are attached to foliage but may be found on tree trunks, rocks or other objects. The mature larva pupates within a cocoon on the foliage or on the trunk in August, adults emerge 10 to 14 days later and after mating, the wingless female lays up to eggs on the empty cocoon.

    The caterpillars emerge in the summer months. They also have large, feathery antennae. Douglas-Fir Tussock moths overwinter as eggs, entering a state of diapause suspended development until spring. Furniss, R.

    Note that female moth is wingless. The caterpillar finishes feeding and molting once warm weather returns, pupating in June. Gypsy Moth caterpillars feed on oaksaspen, and a variety of other hardwoods. In large numbers, the caterpillars can quickly defoliate host plants in the landscape.


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Douglas-fir tussock moth handbook by R. C Beckwith Download PDF Ebook

A follow-up application is also suggested three to four weeks after the initial control is implemented by a professional lawn and tree care team. Unfortunately, no relationship has been found between the location of the sentinel trees and the forested areas that will be defoliated in the future.

Notable species and genera[ edit ]. When is a tree top, or entire tree, really dead? Moths emerge from cocoons in late summer or early fall, when they mate and deposit their Douglas-fir tussock moth handbook book in masses. Brewer, former Colorado State University professor, zoology and entomology; R.

After the initial season of feeding, a tree can usually put out new growth the following year, but with repeated defoliation a tree will die or become prone to bark beetles. Several consecutive years of such feeding can kill trees entirely.

Cocoons usually are attached to foliage but may be found on tree trunks, rocks or other objects. Severe Douglas-fir tussock moth handbook book for more than one year does cause mortality. The forewings are rusty brown and the hind wings grayish brown.

Right: Close-up of blue spruce defoliation by the Douglas-fir tussock moth. Figure 11b. Douglas -fir tussock moths? Douglas-fir tussock moth pupa. Control measures include biological insecticides such as Bacillus thuringiensis Btbut to date these have shown only fair success.

This species overwinters in the egg stage; larvae emerge in late May or early June and feed until late July or August. Some people develop an itchy rash from exposure to the frequently airborne caterpillar hairs.

Trees may die after one or more years of severe defoliation. 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.

The moth spends the winter as an egg within an egg mass. Near view of moth-caused mamage.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 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. Sep 17,  · Derfinitely a tussock moth.

And, if you found it in Colorado on blue spruce it was the Douglas-fir tussock moth. Douglas-fir tussock moth can damage blue spruce. It is rare, and outbreaks are often widely spaced in time at any one location, but when they occur the caterpillars can extensively defoliate the tree.Larval Instars of the Douglas-fir Tussock Moth Volume of pdf States Department of Agriculture.

Agriculture handbook) Issue of Agriculture handbook Douglas-fir tussock moth handbook: Author: R. C. Beckwith: Publisher: U.S.

Tree Top Times

Department of Agriculture, Combined Forest Pest Research and Development Program, Original from: the.Douglas-fir Tussock Moth Control by the Homeowner The Douglas-fir tussock moth, Orgyia download pdf, 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.Tally book Tally meter Altimeter Fiberglass measuring tape Global Positioning Ebook (GPS) Douglas-fir Tussock Moth 3.

Needleminers 4. Fir Looper 5. Fall Webworm 6. Western Tent Caterpillar 7. Aphids Reference handbook for foresters. USDA NA -FR 35 pp.