Western Conifer Seed Bug

Phil Pellitteri, UW Insect Diagnostic Lab Revised:  4/27/2004 Item number:  XHT1052 Western conifer seed bugs belong to the leaf-footed bug family Coreiidae.  Adults are 3∕4 of an inch long, elongate, reddish to dull brown with a faint, white zigzag straight line across the center of the wings.  They have long, thin antennae and hind legs […]

White Grubs on Christmas Trees

P.J. Liesch and R. Chris Williamson, UW-Entomology Revised:  5/20/2013 Item number:  XHT1208 White grubs (i.e., larvae) of the common May/June beetle or “Junebug” (Phyllophaga spp.) are an important pest of Christmas trees in Wisconsin.  This soil-dwelling pest feeds on the roots of pines, firs, and spruces, and can cause damage severe enough to kill small […]

Brown Marmorated Stink Bug

Christelle Guédot, UW-Madison Entomology and Bryan Jensen, UW IPM Program Revised:  3/26/2014 Item number:  XHT1236 Brown marmorated stink bug (BMSB), Halymorpha halys, is an exotic, invasive insect native to Asia, including China, Japan, Korea and Taiwan.  BMSB was first confirmed in the United States in 2001 although an unconfirmed sighting was reported in Pennsylvania in […]

Wisconsin Bee Identification Guide

The Wisconsin Bee Identification Guide provides information about 13 of the most common bees found in Wisconsin. From the very small Sweat Bee, measuring in at 1/4″ long, to the big Bumble Bee, this guide helps identify many incredibly important pollinators!

Webworms

R. Chris Williamson, UW-Extension Turf and Ornamental Specialist Revised:  4/25/2004 Item number:  XHT1066 The term webworm is used to describe several insects whose caterpillars use silk to join plant parts together to form protective nests.  Two common insects that create nests in fruit and woody ornamental trees are the eastern tent caterpillar and the fall […]

Spongy Moth

P.J. Liesch, UW Entomology and R. Chris Williamson, formerly UW Entomology Revised:  4/1/2022 Item number:  XHT1063 The spongy moth, Lymantria dispar (formerly known as the “gypsy moth”) is native to parts of Europe, Asia, and North Africa. It was inadvertently introduced to North America in New England in 1869 and has since spread westward. Over […]

Aphids

Aphids are soft-bodied, sucking insects that are sometimes called plant lice. They feed on plant sap and subsequently excrete a sugary substance (called honeydew) that can attract ants as well as support the growth of a saprophytic fungus called sooty mold. Learn about common aphids found in home gardens in this factsheet.

Viburnum Leaf Beetle

The viburnum leaf beetle (VLB), Pyrrhalta viburni, is an invasive insect that feeds exclusively on and can significantly damage Viburnum species. Currently found in limited areas, mostly in southeastern Wisconsin, its spread is being monitored. Identification and control are described in this factsheet.

Organic and Reduced-Risk Lawn Care

More and more people wish to move in the direction of creating an organic lawn, or what some people call a natural lawn. This publication helps them decide which route to follow: organic lawn care or reduced-risk lawn care.

Aphids, in-depth

Aphids may be viewed as just another pest for gardeners to try to eliminate, but they’re really fascinating insects, with bizarre lifestyles and eating habits and they’re also dinner for lots of other insects. Forming colonies covering the leaves and stems of plants, these small sap-sucking creatures reproduce incredibly fast and a few also transmit plant diseases. Learn more about this large group of insects and how to manage them in the garden in this article…

Protecting Your Tree From Emerald Ash Borer

R. Chris Williamson, UW Turf and Ornamental Specialist, UW-Extension and P.J. Liesch, Associate Researcher, UW-Madison Revised:  7/13/2012 The Emerald Ash Borer (EAB) is an invasive insect that is killing off Wisconsin’s ash trees. EAB was first discovered in Wisconsin in 2008 and has been slowly spreading ever since. In this short video, UW-Madison entomologists Chris […]

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