San José Scale
This factsheet describes the symptoms, life cycle, monitoring methods and control of San José scale (Diaspidiotus perniciosus), which is a concern in poorly managed orchards.
Insects
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…
Spotted Lanternfly
Spotted lanternfly (SLF) is an invasive planthopper native to Asia. Though not yet found in Wisconsin, SLF has potential for severe damage on a large plant host range. Learn what to watch for with this new pest.
Deciduous Tree and Shrub Disorder: Skeletonizing by Rose Chafer
Skeletonizing of leaves of roses, raspberries, grapes and other plants may be caused by adult rose chafers. Learn to identify and manage rose chafer in this publication.
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.
Four-Lined Plant Bug
Four-linied plant bug attacks a wide variety of herbaceous and woody plants. Learn to identify and manage this pest in this factsheet.
Pear Slug (Pear Sawfly)
Pear slugs are not true slugs, but are larva of the pear sawfly. They damge many kinds of ornamental and fruit trees. This factsheet describes appearance, damage and control.
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.
Spotted Tentiform Leafminer, Phyllonorycter blancardella
Spotted tentiform leafminer causes stippled blotches on apple tree leaves. To learn more about this insect pest, read this article…
White-lined Sphinx Moth, Hyles lineata
The white-lined sphinx is a common moth that occurs throughout most of North America. To learn more about this charismatic moth – and its immature stage that just might be living in your garden – read this article…
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…
Eastern Tent Caterpillar, Malacosoma americanum
Tent-like masses in the forks of tree limbs in early spring are the silken nests of the eastern tent caterpillar.
To learn more about this pest and how to deal with it, read this article…
