Mealybugs

If you see fluffy-looking white blobs on your houseplants, you probably have an infestation of mealybugs. These are soft-bodied insects that have a waxy material covering their bodies.  There are many different species of mealybugs that commonly occur on a wide variety of plants. To learn more about these pests and how to control them, read this article…

Pollinators

Christy Stewart, UW Horticulture and USDA-ARS Revised:  12/11/2012 Item number:  XHT1213 Why are pollinators important?  Approximately three quarters of the world’s major food crops require or benefit from animal pollination.  This includes many fruits and vegetables such as strawberries, blueberries, raspberries, currants, plums, apples, sweet cherries, pears, watermelons, cantaloupes, cucumbers, squashes, and tomatoes.  Pollinators also […]

Managing Turfgrass Pests in Wisconsin

Chris Williamson, John Stier, Jeff Gregos, Roger Flashinski Revised:  5/11/2010 Item number:  A3714 Turfgrasses cover more than 30 million acres in the United States. The majority of this acreage is comprised of over 50 million lawns, the remainder is divided among golf courses, athletic fields, sod farms, cemeteries, and other related sites. In its many […]

Viburnum Borer

Major branch dieback, plant decline, and plant death on Viburnum species in Wisconsin are commonly associated with the caterpillars of clearwing borer moths. Heavily infested plants appear unhealthy, and often show swelling, cracks and emergence holes at the base of the plant.

Odorous House Ants

Odorous house ants (Tapinoma sessile) can be found across the United States and are one of the most common ants found in and around structures in Wisconsin. These ants are known for their fondness for sugary foods and their distinctive odor when crushed.

Home Turf Insecticides

Karen Delahaut, UW-Madison Fresh Market Vegetable Program Revised:  5/11/2010 Item number:  XHT1095 Recently, several commonly-used insecticides for the control of insects in home lawns have been taken off the market.  As a result, it’s becoming ever more challenging for home gardeners to find suitable insecticide products at garden centers, discount stores, and hardware stores.  This […]

Lily Leaf Beetle

This insect was first reported in North America in eastern Canada during World War II and was most likely introduced in shipments of plant materials from Europe.  LLB spread to New England in the 1990’s and has been moving westward since that time.  LLB made its first appearance in Wisconsin in 2014 and as of the end of 2019 has been found in 12 counties including Dane, Door, Langlade, Lincoln, Marathon, Oneida, Pierce, Portage, Price, Shawano, Taylor and Wood Counties.

Squash Bug

Squash bugs are an emerging problem in Wisconsin. In recent years, these insects have become more prevalent, causing damage to vine crops in home gardens and commercial fields alike. Squash bugs feed on all vine crops, but pumpkins and squash are their preferred hosts. This factsheet covers identification, life cycle, management and more.

How to Deal with Japanese Beetles by Vijai Pandian (July 22, 2019)

By Vijai Pandian, UW Madison Extension and PJ Liesch, UW Madison Entomology Established in Wisconsin in the 1990s, the Japanese beetle (Popillia japonica) is a voracious defoliator of many landscape and garden plants. Roses, birches, lindens, grapes, raspberries, Norway maples, beans, apples, plums, crabapples, elms, beech, asparagus, and rhubarb are some of its favorite plant species. Full […]

Black Stem Borer

Black stem borer (BSB), also known as the alnus ambrosia beetle, is an invasive beetle from Asia that was accidentally introduced into central Europe and North America. BSB has traditionally been considered a serious pest of nursery and landscape trees, but has also been reported as a pest of fruit crops. This factsheet describes the appearance, life cycle, scouting suggestions and control methods of this important pest.

Painted Lady Butterfly, Vanessa cardui

The painted lady butterfly is a common visitor in Wisconsin, especially in the fall. These colorful insects prefer open areas, including prairies, old fields, vacant lots, and gardens where they feed preferentially on the nectar from relatively tall herbaceous perennials. The spiny caterpillars feed on a large number of different plants. To learn more about this butterfly, read this article…

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