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Insects & Disease of Trees
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Asian Longhorn Beetle (ALB) Information & Links
Find more information about the Asian Longhorn Beetle and other online resources.
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Bagworms
Bagworms eat conifer species of trees and shrubs as their preference then moves to deciduous trees such as sweetgum, maple, hackberry, locust, and elm.
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Fire Blight of Pears & Apples
Find information and resources pertaining the the Fire Blight diseases that plagues apple and pear trees.
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Herbicide Injury (PDF)
Discover how to diagnose and treat herbicide injuries on trees.
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Oystershell Scale
The oystershell scale is one of the most common armored scale insects that cause injury to shade trees and shrubs.
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Thousand Cankers Black Walnut Disease
Originally found to be killing trees in Colorado as early as 2003, this is a newly recognized disease (2008) of primarily Black walnut (Juglans nigra) and caused by a fungus, Geosmithia morbida, that is vectored into the tree by the walnut twig beetle (Pityophthorous juglandis).