Download or read book Important Forest Insect Outbreaks in Western North American During 1963 written by and published by . This book was released on 1964 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Important Forest Insect Outbreaks in Western North American During 1958 written by and published by . This book was released on 1959 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Forest Pest Conditions Western North America 1963 written by Western Forestry and Conservation Association (U.S.). Western Forest Pest Committee and published by . This book was released on 1963 with total page 37 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Important Forest Insect Outbreaks of 1955 in Oregon and Washington written by and published by . This book was released on 1955 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book USDA Forest Service Research Paper PNW written by and published by . This book was released on 1978 with total page 544 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Important Forest Insect Outbreaks in Oregon and Washington in 1958 written by and published by . This book was released on 1959 with total page 9 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Important Forest Insect Outbreaks written by and published by . This book was released on 1958 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Important 1954 Forest Insect Outbreaks written by Intermountain Forest and Range Experiment Station (Ogden, Utah) and published by . This book was released on 1954 with total page 5 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book USDA Forest Service General Technical Report WO written by United States. Forest Service and published by . This book was released on 1975 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Important Forest Insect Outbreaks written by and published by . This book was released on 1957 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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:
Download or read book Major Outbreaks of the Douglas fir Tussock Moth in Oregon and California written by Boyd E. Wickman and published by . This book was released on 1973 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: Case histories of five tussock moth outbreaks that occurred in California and Oregon between 1935 and 1965 are discussed. Information is given on the size and duration of the outbreaks, the presence of natural control agents and the damage caused. Most of the outbreaks were eventually treated with DDT. However, enough information was available from untreated portions to show the probable trend of natural events in the absence of direct control. Repeated patterns observed in each of the outbreaks enabled certain generalizations to be made about natural population behavior and tree impact. All infestations followed a 3-year cycle with inconspicuous to minimal defoliation the first year, severe foliage loss the second year, and ultimate collapse of the population by the end of the third year. The most severe tree damage occurred in the second year. Additional loss of foliage before population collapse in the third year was usually of minor importance in terms of total impact. Although other natural factors were involved, a virus disease appeared to be the principal cause of insect mortality during collapse.
Download or read book Important Forest Insect Outbreaks in 1956 in Oregon and Washington written by and published by . This book was released on 1956 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book USDA Forest Service General Technical Report NC written by and published by . This book was released on 1979 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Paper PNW written by Boyd E. Wickman and published by . This book was released on 1978 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Research Paper PNW written by Arthur R. Tiedemann and published by . This book was released on 1977 with total page 730 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Proceedings of the Symposium on Management of Forest and Range Habitats for Nongame Birds May 6 9 1975 Tucson Arizona written by and published by . This book was released on 1975 with total page 356 pages. Available in PDF, EPUB and Kindle. Book excerpt:
