Insects

Degree Day Calculation

Degree Days incorporate temperature and time to quantify the rate of plant and insect development. This useful tool helps predict events such as flowering, harvest, and pest outbreaks.

Phenology

Phenology is a branch of science that studies the life cycles of plants and animals with seasonal changes and weather. Learn more in this factsheet.

Scale Insects

Scale insects are often overlooked because they are immobile and look like small bumps that just might be plant parts. Learn more about this group of inconspicuous and atypical insects in this article…

Sawflies

Sawflies are a group insects related to wasps. The plant-feeding larvae often look like caterpillars or slugs, and large numbers cause noticeable defoliation on their hosts. Learn more about sawflies in this article…

Mealybugs

Mealybugs are slow-moving, small, oval insects covered in white cottony wax. This factsheet describes the identification, biology and management of this insect pest.

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.

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…

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