Periodical Cicadas

Every 17 years, Wisconsin experiences a massive emergence of periodical cicadas. These insects are generally harmless, but can be quite loud. Adult females can cause some damage to young plants through their egg-laying activities. Learn about the life cycle of cicadas and their management in this factsheet.

Black Vine Weevil

Both the adult and larva of the black vine weevil feed on over 100 species of woody and herbaceous plant roots. Learn to identify and manage black vine weevil in this factsheet.

Roseslug Sawfly

Roseslug sawfly causes damage to leaves of wild and cultivated roses in early summer. This factsheet will help you identify this insect and manage the damage it causes.

Magnolia Scale

Magnolia scale sucks plant sap and excretes drippy, sticky honeydew which can turn black with mold growth. Learn more, including control, in this factsheet.

Euonymus Scale

Euonymus scale attacks evergreen shrub and vine forms of euonymus, along with privet, bittersweet and pachysandra. Learn to identify and manage euonymus scale in this factsheet.

Boxelder Bugs

Though not really harmful to plants, box elder bugs become a nuisance when coming indoors in fall. This factsheet describes the life cycle and habits of box elder bugs.

Ash Flower Gall

Tiny eriophyid mites can cause male flowers and leaf distortions on ash trees. While unsightly, tree health is not adversely affected. Learn more here.

Controlling Carpenter Ants

Large black ants in your home may be carpenter ants. This helpful publication will help you identify and control these household pests.

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

Large silken webs on the ends of branches on trees may be the nests of fall webworm, which feeds on many different shade trees and deciduous ornamental trees. To learn more about fall webworm, read this article…

Support Extension