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Western Spruce Budworm Damage Affects Form And Height Growth Of Western Larch
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Book Synopsis Western Spruce Budworm Damage Affects Form and Height Growth of Western Larch by : Wyman C. Schmidt
Download or read book Western Spruce Budworm Damage Affects Form and Height Growth of Western Larch written by Wyman C. Schmidt and published by . This book was released on 1971 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Atypical feeding behavior of the western spruce budworm (Choristoneura occidentalis Freeman) reduces rapid juvenile height growth and deforms young western larch (Larix occidentalis Nutt.). On western larch, budworm larvae do not confine their feeding to foliage, their usual diet on other conifers; they also feed on and sever stems of current year terminal and lateral shoots. We conducted a five-year study in young larch to determine their susceptibility to this type of damage and how tree form and height growth were affected. We found that: (1) amount and severity of budworm damage increased annually, (2) trees in lightly stocked stands appeared more susceptible to damage when budworm populations were low, but there were no apparent differences by stand density when budworm populations were high, (3) all trees were damaged sometime during the study and no genetic immunity was detected, (4) severance of the terminal shoot was the most serious type of budworm damage to larch, (5) severances reduced net height growth at least one-fourth and resulted in forked, bushy-topped trees, and (6) because of the strong apical dominance characteristic of larch, specific forks in the tree did not persist more than five years.
Book Synopsis How Does Western Spruce Budworm Feeding Affect Western Larch? by : David G. Fellin
Download or read book How Does Western Spruce Budworm Feeding Affect Western Larch? written by David G. Fellin and published by . This book was released on 1973 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This pictorial describes how western spruce budworm larvae feed on young western larch and the trees' responses to this damage. Larvae feed not only on the current year's foliage-their usual diet on most coniferous hosts-but also sever stems of current year's shoots. Multiple-topped, bushlike trees develop in direct response to the amount and type of damage. As a result, trees cannot maintain straight boles and good form. Sustained budworm damage could conceivably influence the management of western larch-one of the more important conifers in the northern Rockies.
Book Synopsis Growth and Yield of Western Larch Under Controlled Levels of Stocking in the Blue Mountains of Oregon by : P. H. Cochran
Download or read book Growth and Yield of Western Larch Under Controlled Levels of Stocking in the Blue Mountains of Oregon written by P. H. Cochran and published by . This book was released on 1999 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Foliage Dynamics and Tree Damage Components of the Western Spruce Budworm Modeling System by : Nicholas L. Crookston
Download or read book Foliage Dynamics and Tree Damage Components of the Western Spruce Budworm Modeling System written by Nicholas L. Crookston and published by . This book was released on 1991 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Western Spruce Budworm by : David G. Fellin
Download or read book Western Spruce Budworm written by David G. Fellin and published by . This book was released on 1982 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Outbreaks of the Western Spruce Budworm in the American Northern Rocky Mountain Area from 1922 Through 1971 by : Philip Cornwell Johnson
Download or read book Outbreaks of the Western Spruce Budworm in the American Northern Rocky Mountain Area from 1922 Through 1971 written by Philip Cornwell Johnson and published by . This book was released on 1975 with total page 152 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Growth of Regeneration Defoliated by Spruce Budworm in Idaho by : Dennis E. Ferguson
Download or read book Growth of Regeneration Defoliated by Spruce Budworm in Idaho written by Dennis E. Ferguson and published by . This book was released on 1988 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Technical Bulletin by : Wyman C. Schmidt
Download or read book Technical Bulletin written by Wyman C. Schmidt and published by . This book was released on 1976 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Ecology and Silviculture of Western Larch Forests by : Wyman C. Schmidt
Download or read book Ecology and Silviculture of Western Larch Forests written by Wyman C. Schmidt and published by . This book was released on 1976 with total page 108 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book General Technical Report RM. written by and published by . This book was released on 1975 with total page 572 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Silviculturist's Point of View on Use of Nonlocal Trees by : Gilbert Herman Schubert
Download or read book Silviculturist's Point of View on Use of Nonlocal Trees written by Gilbert Herman Schubert and published by . This book was released on 1975 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Southwestern Pinyon-juniper Ecosystem by : Earl F. Aldon
Download or read book The Southwestern Pinyon-juniper Ecosystem written by Earl F. Aldon and published by . This book was released on 1973 with total page 750 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Descriptive Analysis of Montana's Forest Resources by : Dennis L. Schweitzer
Download or read book A Descriptive Analysis of Montana's Forest Resources written by Dennis L. Schweitzer and published by . This book was released on 1975 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis USDA Forest Service Resource Bulletin INT. by :
Download or read book USDA Forest Service Resource Bulletin INT. written by and published by . This book was released on 1975 with total page 112 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Stem Volume Losses in Grand Firs Topkilled by Western Spruce Budworm in Idaho by : George T. Ferrell
Download or read book Stem Volume Losses in Grand Firs Topkilled by Western Spruce Budworm in Idaho written by George T. Ferrell and published by . This book was released on 1982 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mature grand firs (Abies grandis [Dougl. ex D. Don] Lindl.) were sampled in two stands, one cutover and one virgin, in the Little Salmon River drainage in west-central Idaho, to estimate stem volume losses associated with topkilling. Damage to the stands resulted from three outbreaks of western spruce budworm (Choristoneura occidentalis Freeman) in 1922-30, 1952-55, and 1969-78. Stems of the firs were dissected and examined for reductions in height and radial growth, stem deformities, and decay associated with topkills. Merchantable volume losses (to a minimum 4-inch diameter top) were calculated for each outbreak. Greatest volume loss was associated with tops killed by the 1922-30 outbreak. Loss varied widely among the trees and stands sampled. In the cutover stand, which received a sanitation cutting in the late 1960's, firs topkilled by the 1922-30 outbreak averaged losses of 9.5 ft3 (0.3 m3), amounting to 11.1 percent of merchantable stem volume. In the vigin stand, losses averaged 26.3 ft3 (0.3 m3) or 20.5 percent of stem volume. Topkill-associated decays, caused mainly by Indian paint fungus (Echinodontium tinctorium Ell. and Ev.) were responsible for most of this loss. Smaller volume losses were recorded in firs topkilled by the 1952-55 outbreak. Losses per tree averaged 3.3 ft3 (0.1 m3) or 5.4 percent in the cutover stand, and 0.5 ft3 (0.02 m3) or 0.3 percent in the virgin stand. These losses resulted mainly from height growth reductions rather than decay. No merchantable volume losses were recorded for the 1969-78 outbreak.
Book Synopsis Proceedings of a Symposium on the Spruce Budworm, November 11-14, 1974, Alexandria, Virginia by :
Download or read book Proceedings of a Symposium on the Spruce Budworm, November 11-14, 1974, Alexandria, Virginia written by and published by . This book was released on 1976 with total page 200 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings written by and published by . This book was released on 1983 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:
