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How Does Western Spruce Budworm Feeding Affect Western Larch
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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 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 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Western Spruce Budworm on Douglas-fir Cone Production in Western Montana by : Allen B. Chrisman
Download or read book Effect of Western Spruce Budworm on Douglas-fir Cone Production in Western Montana written by Allen B. Chrisman and published by . This book was released on 1983 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effect of Fertilization on Western Spruce Budworm Feeding in Young Western Larch Stands by : W. C. Schmidt
Download or read book Effect of Fertilization on Western Spruce Budworm Feeding in Young Western Larch Stands written by W. C. Schmidt and published by . This book was released on 1983 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Silvicultural Strategies to Reduce Stand and Forest Susceptibility to the Western Spruce Budworm by :
Download or read book Silvicultural Strategies to Reduce Stand and Forest Susceptibility to the Western Spruce Budworm written by and published by . This book was released on 1989 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Spruce Budworms Handbook by : Clinton E. Carlson
Download or read book Spruce Budworms Handbook written by Clinton E. Carlson and published by . This book was released on 1989 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Managing Trees and Stands Susceptible to Western Spruce Budworm by : Martha H. Brookes
Download or read book Managing Trees and Stands Susceptible to Western Spruce Budworm written by Martha H. Brookes and published by . This book was released on 1985 with total page 130 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:
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:
Book Synopsis Western Spruce Budworm in Idaho and Montana, 1976 by : United States. Forest Service. Northern Region
Download or read book Western Spruce Budworm in Idaho and Montana, 1976 written by United States. Forest Service. Northern Region and published by . This book was released on 1976 with total page 20 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:
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 Final Environmental Impact Statement by :
Download or read book Final Environmental Impact Statement written by and published by . This book was released on 1989 with total page 710 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Western Spruce Budworm Feeding Effects on Conifers Located on the Boise and Payette National Forests by : Ron Beveridge
Download or read book Western Spruce Budworm Feeding Effects on Conifers Located on the Boise and Payette National Forests written by Ron Beveridge and published by . This book was released on 1984 with total page 25 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Frost Reduces Western Spruce Budworm Populations and Damage in Montana by : David G. Fellin
Download or read book Frost Reduces Western Spruce Budworm Populations and Damage in Montana written by David G. Fellin and published by . This book was released on 1973 with total page 7 pages. Available in PDF, EPUB and Kindle. Book excerpt: Unseasonal temperatures, as low as -6 degrees C, were recorded in western Montana in mid-June 1969, a period when western spruce budworm (Choristoneura occidentalis Freeman) larvae were actively feeding on newly developing foliage of coniferous host trees. Studies in progress at that time provided circumstantial evidence that the freeze reduced: (1) budworm populations on Douglas-fir (Pseudotsuga menziesii var. glauca (Beissn.) Franco), western larch (Larix occidentalis Nutt.), and ponderosa pine (Pinus ponderosa Laws.) over 90%; and (2) budworm damage to young larch 54-71%.
Book Synopsis Resistance of Douglas-fir to Western Spruce Budworm by : Geral I. McDonald
Download or read book Resistance of Douglas-fir to Western Spruce Budworm written by Geral I. McDonald and published by . This book was released on 1979 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
