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PROCEEDINGS of the 36Th ANNUAL WESTERN INTERNATIONAL FOREST DISEASE WORK CONFERENCE

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PROCEEDINGS of the 36Th ANNUAL WESTERN INTERNATIONAL FOREST DISEASE WORK CONFERENCE PROCEEDINGS OF THE 36th ANNUAL WESTERN INTERNATIONAL FOREST DISEASE WORK CONFERENCE Park City, Utah September 1988 Proceedings of the 36th Annual Western International Forest Disease Work Conference Park City, Utah September 1988 Compiled by: Bart J. van der Kamp Faculty of Forestry University of British Columbia Vancouver, British Columbia This scan has not been edited or customized. The quality of the reproduction is based on the condition of the original source. Proceedings of the Thirty-Sixth Western International Forest Disease Work Conference Park City, UT September 1988 . Compiled by Bart J. van der Kamp TABLE OF CONTENTS Page 1 Chairperson's Welcome J. W. Byler 3 Keynote Address Dale N. Bosworth 7 In Memoriam: Clarence R. Quick PANEL: DIVERSE PERSPECTIVES ON DISEASE AND PATHOLOGISTS 8 Views From a Wildlife Ecologist Winifred B. Sidle 9 How Economics Can Contribute to the Applicability of Forest Pathology Research Stephen E. Daniels 12 Incorporating Pest Management into Land Management Decisions Borys M. Tkacz 15 Diverse Perspectives on Disease and Pathologists : view from a Wildlife Biologist John Schwandt 17 Hazard TreeNegetation Management Panel Update James T. Hoffman 18 The Role of Forest Pathologist in the Urban Forest Kenelm W. Russell 26 Hazard Tree Management in British Columbia J. Muir and K. Joy PANEL : MISTLETOE CONTROL WITH ETHEPON 29 Mistletoe Control with Ethepon Frank G. Hawksworth and David W. Johnson 32 Chemistry , Mode of Action, Safety, Uses, and Registration Status of Ethephon for Dwarf Mistletoes Thomas E. Vrabel 34 Ethephon Tests for Lodgepole Pine Dwarf Mistletoes in Colorado Thoma s H. Nicholls 37 Ethephon Tests for Ponderosa Pine Dwarf Mistletoe in Colorado David W. Johnson and Diane M. Hildebrand 39 Ethephon Tests for Ponderosa Pine Dwarf Mistletoe In New Mexico Jerome S. Beatty, Helen Maffei, Edward Collins and Monty Christian 40 Ethephon Tests for Douglas-Fir, Larch, and Ponderosa Pine Dwarf Mistletoes in the Northwest Catherine Parks and James T. Hoffman 41 Ethephon Tests for Dwarf Mistletoes in California Susan Frankel and David Adams 42 Control of Leafy Mistletoe (Phoradendron tomentosum) with Ethephon Ann Marie Wiese 44 Mistletoe Control With Ethepon Conclusions David W. Johnson and Frank G. Hawksworth PANEL: PUBLIC INVOLVEMENT IN FOREST HEALTH - WHO WILL SPEAK? 46 Public Involvement in Forest Health - Who Will Speak? John G. Laut 51 Public Involvement in Forest Health - An Academic Perspective Dick Parmeter 55 Public Involvement in Forest Health -a Forest Pest Management Perspective Dave Holland 58 Public Involvement in Forest Health - a Forest Pathology Research Perspective Ed F. Wicker PANEL: SPECIAL PRESENTATIONS 68 Annosus Root Disease in Western Hemlock 20 Years After Treating Stumps with Borax During ' Precommercial Thinning David C. Shaw, Robert L. Edmonds, Charles H. Driver, Kenelm W. Russell and Willis R. Littke 73 The Development of a Risk Rating System for Comandra Rust in Lodgepole Pine Jane E. Boyd and William R. Jacobi 78 The Effect of Environmental Stress on Cytospora Canker of Aspen John C. Guyon II, William R. Jacobi and Gary A. McIntyre 82 Armillaria in Some New Zealand Second Rotation Pine Stand Martin MacKenzie and Nicholas M. Self 88 Changes in the Incidence of Dwarf Mistletoe Over 30 Years In the Southwest Helen Maffei and Jerome Beatty 91 Forest Management in California State Parks Mark E. Schultz 95 Evidence of Variability in Pathogenicity Among Isolates From an Isozymically Monomorphic Population of Western Gall Rust M. M. Chen, F. W. Cobb Jr., W. J. Libby and D.R. Vogler BUSINESS AND COMMITTEE REPORTS 107 Dwarf Mistletoe Committee Report 113 Disease Control Committee 1988 Investigations 119 Rust Committee Report 120 Root Disease Committee Report 122 Business Meeting Minutes and Treasurer's Report 125 Field Trip 127 WIFDWC Projects 135 Publications: 1987-1988 - 1 - Chairpersons Welcome I u pl~ed to welcome you to the 36th annual Western International Forest Disease WorkConference! ·The first thing I wish to do is recognize several people who have donated considerable and effort to VIFDWCduring this past year: - Fred Baker is in charge of local arrangements . The acco111.1Dodationsare first Ca3S. - John Pronos is prograa chairperson . The prograa promises to stimulate lively discussion. - Greg DeNit~o wa8 last year's secretary . He not only published the pro- ceedings in good time, but he has agreed to take notes for Bart Van Der Caap, our current secretary, who is unable to attend. - Walt Thies has agreed to serve as WIFDWCphotographer. Please cooperate with him. He ha., been asked to get candid shots . Next year's conference will be a joint with the Western Forest Insect Work Conference. It is scheduled for Inn of the Seventh Mountain near Bend, Oregon. Alan Kanaski is making local arrangements. Don Goheen is soliciting suggestions for the program. Before we go on, . I'd like you to stand for a of silence in for two of our who passed away during the past year, Phil Thomas and Clarence Quick. Phil~ a pathologist with the canadian Forest Service and served as director of the Pacific Research Center. ·Clarence~ a research scientist in the Pacific Southwest Forest and Range Experiment Station of the · Forest Service. · It is customary for someone in position to offer words of wisdom or a perspective on WIFDWC.During recent years, we have undergone some introspection as a society of forest pathologists. What have been our successes and reasons for our failures? Such discussions promise to be part of this year's program. I'd like to offer a few ideas thought '-9 we begin .our deliberations: 1. Back in the soon after I arrived at Berkeley, Fields Cobb with the concept that "plant pathology is an applied science, and forest pathologists have the responsibility to serve society--to solve real, economically important forestry problems." I believe it is important for us · to · keep in aind who our clients are--and what our clients needs are for inforaation. Ve need to continually ask ourselves how we can produce and apply usable on technology . · 2. A second idea that I'd like to suggest is the concept (not necessarily a new one) that forest diseases are better prevented than treated. The medical profession has increasingly aware of this in recent years. We forest pathologists are sometimes apologetic because.we have developed few disease cures ~ But we can and to a large degree already have changed the way forests - 2 - 2 are managed. There has been a major change in the pa.st 10-15 years in the degree to which insect and disease treatments are built into the sUvicultural process. 3. Finally, I'd like to end with a ·quotation (maybe not ar:i exact quotation) or another professor of mine, Dick Permeter. 1be thought 1s something like "we can and should have a good time doing the things we take . seriously." · · to WIFDWCand have a good time. - 3 - WESTERNINTERNATIONAL FOREST DISEASE WORK CONFERENCE Dale H. Bo.sworth to Utah! Utah's National Forests are probably the diverse in the U.S.. Within the sil National Forests in Utah, lands range from redrock canyons to alpine wilderness, white water rivers to large reservoirs and Great Ba.sin Desert. oil and ga.,, wildlife ·and fish, livestock forage, water and recreation are all plentiful in Utah's National Forests. Here in Park City we are within an hour's drive of than a a people. In fact the Wasatch-cache NF is one of the heaviest-u.,ed forests for recreation in the United Sta t.e.s. People in Utah are attached to the land. They u.,e their National Forests •. They care about how they are managed and they take an active interest in assuring wise u.,e of the forests. They care about the health and well being_of their public lands. · I think people everywhere care about the health of the public lands . The problem is, there are many different opinions about what a healthy forest is and how to achieve it. I think pathologists have the same problem public land · aanagers do--we have a tendency to a.,sert our personal values onto the public. We tend to think that .if only the public were educated then they would believe a., I do. All too often our public involvement efforts are really efforts to convince the public that they should see the rightness of our ways rather than to seriously try to understand their .desires. We found out ju.,t how the public cared about National Forest lands during our massive forest planning ~ffort started ·some 10 years ago. That taught us a lot about .the land, the resources and the public desires. One important result of planning was the identification or the "Desired Future Condition" for each · parcel of land. Unfortunately, in m,anycases the Desired Future Condition . identified cannot be achieved within the stated standards and guidelines. Why?One problem was the lack of involvement by specialists--our pathologists and The tendency . was to criticize after the fact. It was also partly the fault of planners and managers, tor not aggresively seeking help the scientific couunity. We needed your and expertise in analyzing the con.sequences of different land options. The fact reaains that pathologists need to expand beyond the closed circle of forest disease and into the area of public land aanagement. Forest Plans are a., a social document a., they are a biological document. People's values and lifestyles need to be considered and incorporated into them. And equally the results be achievable both scientifically and socially. Hy eiperience has been that aany pathologists want to stay at arms' length from social and economic factors. You to believe there is only one right way to aanage a piece of land and you are in search of that one right way.
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