Black Vine Weevil

R. Chris Williamson, UW-Extension Turf and Ornamental Specialist Revised:  8/13/2012 Item number:  XHT1065 The black vine weevil was first detected in Connecticut in 1910, and was reported to have been accidentally imported from Europe through the movement of ornamental plants. Subsequently, it has spread across the northern U.S., including Wisconsin. There is a closely related […]

Roseslug Sawfly

Jennifer Sponable, Milwaukee Area Technical College and Phil Pellitteri, UW Insect Diagnostic Lab Revised:  5/25/2010 Item number:  XHT1159 The roseslug sawfly (Endelomyia aethiops) is an insect native to Europe that often causes damage on leaves of wild and cultivated roses in May and June. Appearance:  Roseslug sawfly adults are fly-like insects with two pairs of […]

Magnolia Scale

Phil Pellitteri, UW Insect Diagnostic Lab, UW-Extension Revised:  8/6/2012 Item number:  XHT1154 Magnolia scale has become an increasingly common problem on magnolia trees in Wisconsin.  Popular magnolia species such as star magnolia (Magnolia stellata) and saucer magnolia (Magnolia x soulangiana) are very susceptible to this insect. Appearance: Adult magnolia scale females are shiny brown, elliptical […]

Euonymus Scale

Phil Pellitteri, UW Insect Diagnostic Lab, UW-Extension Revised:  8/6/2012 Item number:  XHT1153 Euonymus scale is a non-native scale that attacks evergreen shrub and vine forms of Euonymus (e.g., wintercreeper).  In addition, this insect attacks privet, bittersweet and pachysandra. Appearance: Euonymus scale females grow up to 1/16 inch in length, are brown and are shaped like […]

Boxelder Bugs

Rebecca Hoffman*, UW-Entomology and Phil Pellitteri, UW Insect Diagnostic Lab Revised:  5/7/2010 Item number:  XHT1100 Boxelder bugs, a true bug from the insect family Rhopalidae, are commonly found both outside and inside homes during the fall through early spring. Boxelder bugs are about 3⁄4 of an inch long, and black in color with three red […]

Ash Flower Gall

Phil Pellitteri, UW Insect Diagnostic Lab, UW-Extension Revised:  8/6/2012 Item number:  XHT1048 What is wrong with my ash tree?  Galls are abnormal plant growth that can be caused by insects, mites or plant diseases.  On ash trees, a tiny eriophyid mite causes male flowers to grow into round greenish, 1∕2 to 1 inch diameter tumor-like […]

Controlling Carpenter Ants

P.J. Pellitteri Revised:  1/15/2003 Item number: A3641 (Download Now) If you see large black ants skittering around your home, they may be carpenter ants. This helpful publication will help you identify and control these household pests.     Download Article

Mighty Mites

Did you know that there are mites that eat other mites? Barely visible to the naked eye, these little predators help keep spider mites and other pests in check. Read on to learn more about this fascinating world of tiny predatory mites…

Fall Webworm, Hyphantrea cunea

If you have noticed large silken webs on the ends of branches on trees this time of year, you are looking at the nests of fall webworm. This native insect feeds on many different shade trees and deciduous ornamental trees. To learn more about fall webworm, read this article…

Eastern Tent Caterpillar, Malacosoma americanum

White tent-like masses in the forks of tree limbs in early spring are the silken nests of the eastern tent caterpillar, a native insect that develops on fruit and hardwood trees. It is often confused with the fall webworm, which also creates silken nests. To learn more about this pest and how to deal with it, read this article…

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