Deciduous Tree Galls
Galls are abnormal growths on plants that can result from the feeding of living organisms such as bacteria, fungi, nematodes, insects and mites. Learn about common galls in this factsheet.
View ArticleAphids, in-depth
Aphids are really fascinating insects, with bizarre lifestyles and eating habits Learn more about this large group of insects and how to manage them in the garden in this article…
View ArticleWoody Ornamentals Pest Management in Wisconsin
An indispensable resource for nursery growers, this publication identifies pests of trees and shrubs in the state plus the products available for their control.
View ArticleViburnum Leaf Beetle
The viburnum leaf beetle (VLB), Pyrrhalta viburni, is an invasive insect that feeds exclusively on and can significantly damage Viburnum species. Identification and control are described in this...
View ArticleAphids
Aphids are soft-bodied, insects that feed on plant sap and subsequently excrete a sugary substance that can attract ants as well as support a saprophytic fungus called sooty mold. Learn about aphids...
View ArticleSpongy Moth
Spongy moth (formerly gypsy moth) is a destructive insect when the caterpillars occur in large numbers and defoliate trees. This factsheet will help with identification and management of this pest.
View ArticleWebworms
The term webworm is used to describe several insects whose caterpillars use silk to join plant parts together to form protective nests. Learn about two webworms found in Wisconsin in this factsheet.
View ArticleBrown Marmorated Stink Bug
Brown marmorated stink bug is a non-native pest that feeds on awide range of plants. This insect is also a nusiance when it overwinters indoors. Learn about identification and management in this...
View ArticleBoxelder Bug, Boisea trivittatus
Pesky boxelder bugs are very noticeable in the fall when they congregate before overwintering in buildings. To learn more about this nuisance pest, read this article...
View ArticleJapanese Beetle
The Japanese beetle, Popillia japonica, is a significant pest of landscape trees and shrubs, vegetable and fruit crops, and turfgrass. This factsheet describes the lifecycle of this beetle along with...
View ArticleStrategies for Identifying and Managing Insect Pests
By: PJ Liesch, Extension Entomology Specialist Even though insects can cause damage to our plants, not all of them are harmful. In this video, you will learn how to look for signs of insects, why...
View ArticleElm Zigzag Sawfly
The elm zigzag sawfly is an invasive sawfly that attacks elm trees. Populations were detected in Wisconsin for the first time in July 2024 and were quickly found in several counties across the state....
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