Webinar: Invasive Insects of Shade Trees: A 30 Year Perspective from Colorado

    May 02, 2018
    12:00 PM - 1:00 PM
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    “Invasive Insects of Shade Trees: A 30 Year Perspective from Colorado”

    • Dr. Whitney Cranshaw, Colorado State University
    • May 2, 2018 at 12:00 p.m. Mountain. (translate to your time zone HERE)
    • Register HERE.
    • One CEU available from ISA, SAF or NALP; must watch live broadcast to receive CEU credit.
    • Webinar will be archived within one week of broadcast at treefund.org/webinars.


    Dr. Cranshaw will discuss the ever-changing cast of new and invasive tree insects that have become issues in the Rocky Mountain states over the past 30 years. Through human-assisted spread there has long been a constant flow of new insects colonizing the woody landscape plants of the Rocky Mountain/Intermountain West, involving both species that are native to other areas of North America and those that are of more exotic origin. How well these new colonizers establish is often very different than occurs in other regions due to differences in climate, geography, landscaping practices, and the mix of plants present. In this discussion we will provide a review of how various introduced species on shade trees and shrubs have developed – or in some cases failed to develop – as pests of woody plants over the past three decades in Colorado.

    Whitney Cranshaw is presently a professor and Extension Specialist of Entomology at Colorado State University. For the past 34 years he has conducted a broadly based program largely directed at questions involving arthropod pests affecting horticultural commodities in Colorado, including vegetables, shade trees, turfgrass and specialty crops. Much of his attention has involved projects of shade trees and shrubs woody plants, including the discovery and description of thousand cankers disease of walnut, drippy blight of red oak, and the occurrence of neonicotinoid resistance among European elm scale. This has resulted in production of over 85 refereed publications and several hundred related to Extension and outreach. Among the latter include the books Insects and Diseases of Shade Trees in ColoradoBugs Rule! An Introduction to the World of Insects and, most recently, Garden Insects of North America, 2nd Edition

    Read about Dr. Cranshaw’s work funded by TREE Fund HERE.

    Thank you to our webinar host Utah State University Forestry Extension and Utah Division of Forestry, Fire and State Lands.