Iris Borer

Iris borer is the most serious pest of iris in Wisconsin. Iris plants attacked by iris borer will discolor, wilt, and die during late June and July. On close examination of affected plants, a pinkish-white caterpillar can be found feeding on the inside of rhizomes. This factsheet covers identification and control of this serious pest.

May/June Beetles

May/June beetles or “Junebugs” are native insects common throughout Wisconsin often be seen near lights on early summer evenings. Learn about these large beetles and their larva in the soil in this factsheet.

Insect Pest Management for Greenhouses

This handy chart lists pesticides that are most effective against common greenhouse pests such as aphids, scales, leafminers, spider mites, and thrips. Formulation, effectiveness, cautions, and other details are provided.

Black Cutworm

Black cutworm larvae are active nighttime feeders, clipping seedlings at or below the soil line. Find out when to monitor and control this pest to limit damage in this publication.

Caterpillar Pests of Cole Crops

This factsheet covers the imported cabbageworm, the cabbage looper, and the diamondback moth. Scouting tips and effective means of control are highlighted.

Corn Earworm

Corn earworm can cause serious economic damage to commercial and home-grown sweet corn and hybrid dent seed corn, as well as tomatoes, lettuce, peppers and beans. Learn more in this factsheet.

Cucumber Beetles

Spotted and striped cucumber beetles damage vine crops, including cucumbers, squash, melons and pumpkins. This factsheet details the lifecycle, damage, and controls of these beetles.

Potato Leafhopper

Potato leafhopper is a serious pest of snap beans and potatoes, causing stunted plants, brown leaves, and reduced plant vigor. Learn more in this factsheet about this insect’s lifecycle and how to best control it.

Squash Vine Borer

Squash vine borer is an annual pest of pumpkins and squash. This factsheet describes the insect’s lifecycle, damage it causes, and various effective means of control.

Vegetable Leafminers

Leafminers are the larval stage of flies, moths, sawflies and beetles that can cause damage to leafy vegetables such as spinach and chard. Learn more about controlling the damage in this factsheet.

Common Spiders In and Around the Home

W.L. Gojmerac Revised:  1/24/2012 Item number:  A2135 Approximately 1000 species of spiders are found in this country, living almost anywhere.  Learn about the dangers and problems and control of some spiders.

Support Extension