Learn at Lunch Webinars | Extension Forestry

    Learn at Lunch Webinars

    The Role of Insects and Diseases in Aspen Biology

    John Guyon, Forest Pathologist, USFS, Intermountain Region

    Date: Tuesday, February 20, 2018

    Time: 12 pm (MDT)


    John Guyon

    In part due to its vegetative strategy, western aspen is host to a large number of insects and diseases. However, only a few are agents of significant impact that can cause or warn of substantial changes in the condition of aspen clones. Environmental conditions, particularly drought stress, also play an integral role in the life cycle of the important insects and diseases of aspen, and regional droughts were the triggering factor in the initiation of the most notable instances of substantial aspen dieback and decline.

    John Guyon has worked for Forest Health Protection, USDA Forest Service as a Forest Pathologist for the last 28 years in Ogden, Utah. His position involves technical assistance to land managers, teaching, and research.
    John earned his undergraduate degree in Botany at the University of Illinois, and his MS in forest pathology at Colorado State University, where he conducted research on the impacts of environmental stress on diseases of aspen.

    This webinar is co-sponsored by the Western Aspen Alliance.

    Western Aspen Alliance

    You may receive 1 CEU from either the Society of American Foresters OR International Society of Arboriculture if you view the webinar live. To receive CEU credit, register for the webinar at the link above. Follow the directions on the registration page. You will need to cut and paste the google form web address found on the registration page into a new browser window and enter your identification information there. This process streamlines the CEU accreditation process and ensures accurate information retrieval. We will verify your attendance during the live webinar before CEU credits are issued. CEUs are only available to those that watch the webinar 'live'. 
    How to enter the webinar? Click on the link above, it will prompt you to download Zoom (if you haven't previously). Fill out the information portion and answer a few questions to complete your registration for this FREE webinar. A reminder email will be sent the day of the webinar if you preregister.

    Want to remain informed about future webinars and CEU credit-earning opportunities?

    Register for our newsletter – we send (max.) 2 emails / month!

    Save the Date for Future Webinars:

    March 6, White Satin Moth in the Lake Tahoe Basin, Current Conditions; Gene Phillips, Forest Health Specialist, Nevada Division of Forestry, Register here.

    April 24, A History and Future of White Pine Blister Rust in North America; Katie McKeever, Forest Pathologist, Montana Department of Natural Resources and Conservation (DNRC), Register here.

    May 2, Invasive Insects of Shade Trees: A 30 Year Perspective from Colorado, Dr. Whitney Cranshaw, Colorado State University, Register here.

    November 14, Dr. Dan Herms, VP for Research and Development, The Davey Tree Expert Company, Emerald Ash Borer 


    Archived Webinars

    Date Title Presenter
    Jan. 16, 2018

    Green Stormwater Infrastructure Use to Control Combined Sewer Overflows

    John Phillips, King County Wastewater Treatment Division, WA
    Dec. 5, 2017

    Selection and Propagation of Native Woody Plants for the Intermountain Area

    Dr. Larry Rupp, Utah State University
    Nov. 30, 2017

    Drought Tolerance in Trees - Improving Tree Selection for Challenging Urban Sites

    Dr. Andrew Hirons, Myerscough College, U.K.
    Sept. 24, 2017

    Landfire - All Lands Data from Vegetation to Fuels: Planning, Engagement and Feedback

    Henry Bastian, LANDFIRE Business Lead
    Aug. 1, 2017

    Bark Beetle Outbreaks in Western North America: Causes, Control and Consequences

    Dr. Jodi Axelson, Assistant Cooperative Extension Specialist, UC Berkeley
    July 25, 2017

    Low-tech Flame Carbonizers for Biochar Production: Theory and Applications

    Presentation slides, available for download here.

    Kelpie Wilson, Wilson Biochar Associates
    June 21, 2017

    Soil Profile Rebuilding: Rehabilitating Compacted Soils

    Presentation slides, available for download here.

    Dr. Susan S. Day, Associate Professor of Urban Forestry, Virginia Tech
    May 9, 2017

    Managing Trees During Drought Conditions

    Presentation slides, available for download here. 

    Dr. Heidi Kratsch, University of Nevada, Reno
    April 25, 2017 Planting Healthy Air: How Trees Can Make Cities More Livable Rob McDonald, The Nature Conservancy
    March 14, 2017 Avoiding and Remedying Abiotic Injury of Trees Marion Murray, Utah State University, IPM Project Leader
    February 21, 2017 Developing verbenone as a semiochemical tool to suppress mountain pine beetle Rob Progar, Chris Fettig, Steve Munson
    January 11, 2017 Searching for Goldilocks Balancing Forest Ecosystem Restoration and Old-Forest Species Conservation in the Sierra Nevada, CA Gavin M. Jones, University of Wisconsin-Madison
    November 30, 2016 Soil Compaction and Urban Trees: Strategies for Gaining Ground Dr. Bryant Scharenbroch
    October 4, 2016 Cross-laminated timber, what's all the fuss? Darren McAvoy, Jerry GoodSpeed, Euclid Timber, Method Studios
    September 13,2016 From Pixels to Landscapes, Leveraging LANDFIRE for Land Management Randy Swaty
    August 30, 2016 Climate, wildfire, and erosion ensemble foretells more sediment in western USA watersheds Dr. Joel Sankey
    July 13, 2016 Climate variability and fire effects on quaking aspen in the central Rocky Mountains, USA Dr. Vachel Carter
    June 14, 2016 Fires and beetles and droughts, oh my: Recent status and trends from the national Forest HealthMonitoring Program AND Tree sleuths, finding out why forest trees were dying in Vermont? Dr. Kevin Potter and Sandy Wilmot
    May 11, 2016 An approach to pruning you won't forget Dr. Ed Gilman
    April 19, 2016 Part 1: Investigating Maple Dieback and Decline in Michigan
    Part 2: Evolving Paradigms of Aspen Ecology and ManagementOptions for Reducing Wood Smoke
    Tara Bal & Kevin Krasnow
    March 22, 2016 Options for Reducing Wood Smoke Joel Karmazyn & John Ackerly
    February 16, 2016 Country Mouse, City Mouse: Fruit Gleaning Programs for Large and Small Communities Jason Barto & Shawn Peterson
    January 26, 2016 Adapting to Climate Change in Western National Forests David Peterson, Jessica Halofsky, & Natalie Little
    December 1, 2015 How to Fit Large Trees Into Communities Dr. Mike Kuhns
    October 20, 2015 Aspen Response to Drought and Climate Change in the 21st Century Dr. William Anderegg
    September 23, 2015 Strategies for Successful Urban Tree Growth in Wet and Dry Sites Dr. Hallie Dozier & Dr. Nina Bassuk
    August 25, 2015 Ogden's Green Street: Making Connections Monte Stewart
    July 28, 2015 Biochar and Applications for Restoration in the Uinta Basin, Utah Chris Peltz & Darren McAvoy
    June 16, 2015 Mapping Human or Natural Disturbance Effects on Coniferous Forest Canopies Using Field Plot and Lidar Data Dr. Andrew Hudak & Benjamin Bright
    May 19, 2015 i-Tree Version 6 Preview: Applications and Strategies for Utah Communities Al Zelaya
    April 28, 2015 Emerald Cash Borer: It Will Cost You Money - Ways to Manage the Ash Cash Flow Dr. Richard Hauer & Randall Miller
    March 24, 2015 Bird Friendly Tree and Shrub Pruning and Removal Janice H. Gardner & Melissa Burns
    February 24, 2015 Elms Are Back! Dr. Bruce R. Fraedrich
    January 20, 2015 Herbivory in Aspen Forests: Ecological Context and Mechanisms of Defense Dr. Richard Lindroth & Dr. Sam St. Clair
    December 9, 2014 A Practical Strategy for Managing Forest Adaptation to Climate Change with a Case Study of Aspen and Sprucein Southwestern Colorado Jim Worrall
    November 18, 2014 Utah's Wildland Urban Interface: Fire Prevention Nate Barrons
    October 28, 2014 Millers Flat - An Integrated Tale Diane Cote
    August 26, 2014 Planting Trees in the Desert: Can We Have Our Cake and Eat it Too? Tara L.E. Trammell
    July 22, 2014 When Urban Forests and Infrastructure Collide Paul Shwartz
    June 24, 2014 Trees and Water Roger Kjelgren & Larry Rupp
    May 27, 2014 Fire Science and You: Working With Your Local Fire Science Network Gloria Edwards & Génie MontBlanc
    April 30, 2014 Fruit Tree Selection and Care Marion Murray & Brent Black
    March 18, 2014 Fire, Historical Change, and Resilience Management in Quaking Aspen Douglas Shinneman, Dominik Kulakowski, and Paul Rogers
    February 25, 2014 Soil Basics and How Utah is Adapting Douglas Merkler & Shawn Freedberg
    January 21, 2014 Biochar Basics Britney Hunter & Jim Ippolito
    October 29, 2013 Western Aspen Regeneration Ecology James Long, Mary Lou Fairweather & Karen Mock
    September 24, 2013 What it Takes to Grow a Good Root System Mike Kuhns
    August 27, 2013 Urban Forest Health: Common and New Tree Pests Colleen Keyes
    July 30, 2013 Experience Big Trees: National and Utah Perspectives Sheri Shannon & Meridith Perkins
    June 25, 2013 The Effects of Urban Trees on Air Quality David Nowak
    May 21, 2013 An Introduction to Woody Biomass and Biochar in Utah Darren McAvoy
    April 23, 2013 Tree Planting Primer: Tips and Tricks Just in Time for Arbor Day Ross Chambless & Alex Porpora
    March 19, 2013 How to Talk Trees to Kids: Project Learning Tree Ideas Charice Bourdeaux
    February 26, 2013 The People Part of Forestry: public relations for forestry projects Rose Long
    January 22, 2013 The USU Botanical Center Tree Evaluation Project JayDee Gunnell
    November 27, 2012 Strategic Tree Planting: State and National Efforts to Maximize Tree Benefits Randy Gordon & Meridith Perkins
    October 22, 2012 Utah Canopy Cover - Turning Assessment into Action Chris McGinty & Ian Hanou
    May 16, 2012 U.S. Forest Service Interior West FIA 2012 User Group Webcast Various
    February 22, 2012 Aspen Ecology and Management Webinar; WAA/BLM/USU Extension Forestry Various
    May 12, 2010 Tree Biology and Pruning; USU Extension/Utah Community Forest Council Webcast Randy Miller
    April 18, 2010 U.S. Forest Service Interior West FIA 2010 User Group Online Meeting Various
    January 28, 2010 Ten Do-it-yourself Tips for Maintaining your Family Forestland Darren McAvoy
    November 17, 2009 Bark Beetles in Utah Matt Hansen
    September 24, 2009 Monitoring Forest Health Trends in Utah John Shaw
    June 24, 2009 Planning a Timber Harvest, Part II Darren McAvoy
    May 27, 2009 Planning a Timber Harvest, Part I Darren McAvoy
    March 18, 2009 What's in a Name? Tree Taxonomy and an Introduction to Tree Identification Mike Kuhns
    January 14, 2009 An Introduction to Utah Trees and Forests Darren McAvoy