Download or read book Recommendations for Reduction of Damage to Douglas fir by Poria Weirii a Root Rot written by Thomas W. Childs and published by . This book was released on 1951 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laminated Root Rot of Douglas fir in Western Oregon and Washington written by Thomas White Childs and published by . This book was released on 1970 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laminated Root Rot Damage in a Young Douglas fir Stand written by E. E. Nelson and published by . This book was released on 1980 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phellinus Poria Weirii Root Rot in Douglas fir alder Stands 10 17 Years Old written by Everett M. Hansen and published by . This book was released on 1975 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laminated Root Rot written by James S. Hadfield and published by . This book was released on 1977 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laminated Root Rot in a Western Washington Plantation written by Richard E. Miller and published by . This book was released on 2006 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: A 4-year-old Douglas-fir plantation in the western Washington Cascades was monitored for 8 years after fertilization with potassium (K), nitrogen (N), and K+N to determine fertilizer effects on rates of mortality from laminated root rot (LRR) and other causes relative to a nonfertilized control. Each element was applied at a rate of 300 lb/acre on and around 0.2-acre plots replicated seven times in a randomized complete block design. Cumulative mortality from LRR did not differ significantly among fertilizer treatments, and losses were strongly related to density of infected stumps from the previous stand (r2 = 0.74). Mortality from disease and other sources accelerated during the 8 years of monitoring. Average tree growth and stand volume were greatest in treatment N and were reduced where N was combined with K. Continued monitoring is needed to identify potential longer term effects of the fertilizer treatments on susceptibility of Douglas-fir to LRR and Armillaria spp.

Download or read book Poria Weirii Root Rot of Douglas Fir written by Canada. Department of Agriculture. Research Branch and published by . This book was released on 1955 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laminated Root Rot in Western North America written by and published by . This book was released on 1995 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Phellinus poria Weirii Root Rot written by Canadian Forestry Service and published by Pacific Forest Research Centre. This book was released on 1976 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Comparison of Phellinus Weirii Root Rot Damage in a 60 year old Douglas fir Pseudotsuga Menziesii Stand with the Damage in the Preceding Old growth Stand written by Borys M. Tkacz and published by . This book was released on 1979 with total page 228 pages. Available in PDF, EPUB and Kindle. Book excerpt: Laminated root rot of Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) caused by the fungus Phellinus weirii (Murr.) Gilbertson was studied in two successive stands in the Oregon Coast Range. Damage due to the disease in a 60-year-old second-growth stand was compared with incidence in the preceding 300-year-old stand on the same site. Information for the comparison was gathered by mapping all current stand trees (living and dead) and the remains of previous stand trees on four one hectare plots. Damage in each stand generation was assessed in terms of the reduction in stand density and basal area by P. weirii caused mortality, the extent of infection among living trees, and the plot area covered by the disease. Current stand damage estimates were based on the amounts and distribution of healthy, infected and dead trees. Live infected trees were diagnosed by the presence of either surface mycelium or internal decay as evidenced by root collar excavation and increment boring of all trees around disease centers. Previous stand damage estimates were based on the number and distribution of infected stumps, snags, and old down trees. Setal hyphae were used as positive evidence of P. weirii decay in old growth residuals. The comparisons of damage revealed that laminated root rot was more destructive in the previous stand at the time of its harvest than in the current second-growth stand. The reduction in stand density by P. weirii caused mortality was greater in the previous stand (75.5%) than in the current stand (41.7%). In the previous stand 60.9% of the trees living at harvest were infected while 35.1% of the living trees were infected in the current stand. The reduction of Expected Basal Area (of a healthy stand on the site) by P. weirii caused mortality was also greater in the previous stand (56.6%) than in the current stand (22.5%). The proportion of the Actual Basal Area infected was also higher in the previous stand (61.8 %) than in the current stand (41.1%). Phellinus weirii was present on 82.5% of the previous stand plot area compared to 51.2% of the current stand plot area. The difference is largely attributable to the larger Area of Concentrated Mortality in the previous stand (68.4% vs. 36.3%). Differences between plots in the Total Area of Infection in the current stand were best related to differences in the type of inoculum from the previous stand and area affected by these inoculum sources (Area of Potential Inoculum). Sixty-five percent of the currently diseased area lay beyond the Area of Potential Inoculum from the previous stand, indicating significant tree to tree spread in the current stand. Although damage levels were higher in the previous stand (at its harvest) than those currently found, the average annual rate of damage increase was much higher in the current stand than the previous stand. Projections of current damage rates to a comparable age predict much higher losses due to the disease in the current stand than were found in the previous stand.

Download or read book USDA Forest Service Research Paper PNW written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1969 with total page 374 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Synopsis of Present Information Concerning Poria Weirii Root Rot in Douglas fir written by Thomas W. Childs and published by . This book was released on 1955 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Report written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1952 with total page 368 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book USDA Forest Service General Technical Report PNW written by and published by . This book was released on 1977 with total page 224 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Growth Loss in Douglas fir Infected with Phellinus Poria Weirii Root Rot written by B. D. Ford and published by . This book was released on 1977 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Annual Report of the Pacific Northwest Forest and Range Experiment Station for the Calendar Year written by Pacific Northwest Forest and Range Experiment Station (Portland, Or.) and published by . This book was released on 1957 with total page 518 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Infectious Forest Diseases written by Paolo Gonthier and published by CABI. This book was released on 2013 with total page 681 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today, forest health and the management of threats towards it are attracting more and more attention on a global scale. This book covers the most recent advances in the management of forest diseases, including the epidemiology and infection biology of forest pathogens, and forest protection based on integrated pest and disease management approaches. A comprehensive range of diseases caused by viruses, bacteria, fungi and other organisms are discussed in detail, making this book essential reading for forest managers and extension specialists. Written by recognized authorities in the subject of forest health, this book also provides a wealth of information useful for researchers and lecturers of forest pathology and ecology.