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 […]
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 (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.
Fungus gnats (Family Sciaridae) are insects commonly associated with overwatered houseplants. They can become a nuisance when they are present in large numbers and fly around inside a home. In most situations, fungus gnats are a cosmetic problem. However, on occasion, fungus gnat larvae can cause plant damage.
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 […]
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 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.
Karen Delahaut, UW-Madison Fresh Market Vegetable Program Revised: 5/17/2012 Item number: XHT1085 The word phenology is derived from the Greek word phaino meaning “to show” or “to appear”. Phenology is a branch of science that studies the relationships between periodic biological events—usually the life cycles of plants and animals—and environmental changes. Natural events such as […]
Karen Delahaut, UW-Madison Fresh Market Vegetable Program Revised: 8/6/2012 Item number: XHT1086 Indicator plants are not always suitable for the timing of pest management practices. You may not have the critical indicator plant nearby to time local activities, or there may not be a good indicator plant for a particular pest’s crucial life stage. Another […]
Karen Delahaut, UW-Madison Fresh Market Vegetable Program Revised: 8/6/2012 Item number: XHT1087 Common Vegetable Insects that can be monitored using degree days or indicator plants Cabbage Maggot Base temperature = 43°F 300, 1476, 2652 DD43 for 1st, 2nd, & 3rd generations flies 1st generation eggs are laid when the common lilac is in full bloom […]
Phenology is the study of the cyclical or seasonal nature of animals and plants. This seasonality allows us to predict quite well when an insect will be doing what, and thus, when we might find damage. Some damage that’s apparent right now is from the raspberry cane borer (Oberea perspicillata), a beetle in the family […]
Ips bark beetle, also known as the pine engraver, is an insect that attacks and kills weak, stressed, declining and dying pine and spruce trees. These insects are attracted to trees that have been stressed from drought, construction damage, overcrowding, transplant shock, flooding, disease and other insect problems. Identification and management are covered in this fact sheet.