Download or read book Field Classification of White Pine Blister Rust Stem cankers on Resistant Western White Pine in Northern Idaho and Determination of Respective Tissue Damage Through Tree Ring Analysis written by Amy I. Eckert and published by . This book was released on 2007 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt: Western white pine historically dominated northern Idaho's forested landscape and was the Inland Empire's most economically important tree. White pine blister rust, caused by the exotic fungus Cronartium ribicola, played a principal role in the decline of western white pine. The pathogen causes branch and bole cankers, which usually girdle and kill their host. Efforts to restore western white pine populations are underway. Despite gains in resistance during over 50 years of tree improvement efforts, high infection rates still challenge growth and management of rust-resistant western white pine in northern Idaho. One rust- resistance expression of particular promise in tree breeding orchards is abnormal or slow stem-canker growth. Abnormal or slow stem-canker growth also appears to occur in pole-sized (15-20 years old) plantations of rust resistant western white pine in northern Idaho. The extent to which outward stem canker appearance is related to internal tree tissue damage has not been previously addressed. In this study, between 2004 and 2006, blister rust-caused stem cankers were grouped into three classes of expected severity based on field assessment of exterior canker characteristics. Cankers with the most aggressive looking characteristics (those with bright orange diamond-shaped margins, heavy resinosous, and no apparent defensive reaction of the host tree) were classified as Class I cankers. Cankers that had limited or no orange margins and had mild to moderate resinosous were classified as Class II cankers. Cankers with the least aggressive looking characteristics (those with no orange margins, tree tissue swelling to the extent that the swelling made a vertical depression on the tree bole, no resinosous, and an inactive appearance) were classified as Class III cankers. Stem cankers were examined on pole-sized, rust-resistant trees in three western white pine plantations in northern Idaho. After field classification, the cankers were harvested and cross-sectioned to determine: (1) the extent to which exterior canker appearance is related to internal tree tissue damage, (2) if tree circumference just prior to canker initiation is related to tree tissue damage during the first year following canker initiation, and (3) the relative impact of different class cankers on tree growth. Measurements of cross-sectioned cankers indicate statistically significant differences in tree circumferential tissue damage (percent tree girdle) during years 1 through 5 following canker initiation between canker Classes I and III, and between canker Classes II and III during years 1 through 8. Difference in median percent girdle was not significant between Classes I and II. Additionally, tree circumference just prior to canker initiation and tree tissue damage during the first year following canker initiation were positively correlated; as tree size increased, first year percent girdle of host trees also increased. Finally, the ratio of circumferential tree growth post-canker initiation to growth pre-canker initiation differed significantly among trees infected with different class cankers. Differences were significant between canker Classes I and III and between Classes II and III, but not between Classes I and II. Growth ratios were smaller for trees with more aggressive appearing cankers. These research results will help foresters field-classify stem cankers and predict performance of infected rust-resistant western white pine. Knowing the relative tree damage and impact on tree growth of cankers with different exterior characteristics will help foresters develop silvicultural prescriptions, including prescriptions for pruning and thinning to encourage development of target stand composition and structure. Abnormal or slow-growing cankers may indicate that their host will survive longer than expected. In addition, observed differences in canker morphology and growth of infected trees may enhance tree breeders' and geneticists' investigations of slow canker growth mechanisms.
Download or read book Resistance of Western White Pine to Blister Rust 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:
Download or read book White Pine Blister Rust Control Annual Report Calendar Year written by and published by . This book was released on 1954 with total page 584 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Summary of White Pine Blister Rust Research in the Lake States written by Ralph L. Anderson and published by . This book was released on 1973 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book History of White Pine Blister Rust Control written by Warren V. Benedict and published by . This book was released on 1981 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Field Levels of Infection of Progenies of Western White Pines Selected for Blister Rust Resistance written by R. J. Steinhoff and published by . This book was released on 1971 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book How to Identify White Pine Blister Rust and Remove Cankers written by Thomas H. Nicholls and published by . This book was released on 1977 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book White Pine Blister Rust Canker Expansion on Improved Western White Pine in Northern Idaho written by John W. Schwandt and published by . This book was released on 2013 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book How to Manage Eastern White Pine to Minimize Damage from Blister Rust and White Pine Weevil written by Steven A. Katovich and published by . This book was released on 1993 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book White Pine Blister Rust in California written by John T. Kliejunas and published by . This book was released on 2003 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Economics of White Pine Blister Rust Control in the Lake States written by United States. Forest Service and published by . This book was released on 1960 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Climatic Distribution of Blister Rust on White Pine in Wisconsin written by Eugene P. Van Arsdel and published by . This book was released on 1961 with total page 38 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Aiding Blister Rust Control by Silvicultural Measures in the Western White Pine Type written by Virgil D. Moss and published by . This book was released on 1953 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Incidence of White Pine Blister Rust Infection in the Lake States written by D. B. King and published by . This book was released on 1958 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book White Pine Blister Rust at Mountain Home Demonstration State Forest written by Bohun B. Kinloch and published by . This book was released on 1990 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Computer Simulation of White Pine Blister Rust Epidemics written by Geral I. McDonald and published by . This book was released on 1981 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The White pine Blister Rust written by Henry Torsey Fernald and published by . This book was released on 1912 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
