Bird’s nest fungi are not harmful to plants, but grow on decomposing organic matter, such as on mulch in planting beds with damp, shady conditions. Learn more in this factsheet.
Mealybugs are slow-moving, small, oval insects covered in white cottony wax. This factsheet describes the identification, biology and management of this insect pest.
Dead man’s fingers is the name of a mushroom-like fungal growth that can be found at the base of dead or dying trees and shrubs, as well as wood objects. Learn about this distinctive fungus in this factsheet.
Four-linied plant bug attacks a wide variety of herbaceous and woody plants. Learn to identify and manage this pest in this factsheet.
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.
Known mostly for their loud buzzing sound in summer, cicadas also feed on a wide variety of plants. Learn about the life cycle of cicadas and their management in this factsheet.
Bitter pit and cork spot are common disorders of Wisconsin apples, when weather conditions are just right. This factsheet describes what can be done to reduce the severity.
Bacterial canker is a common and sometimes lethal disease of trees in the genus Prunus including cherry, plum and peach. This factsheet describes symptoms and management of bacterial canker.
Peach leaf curl is a common disese of peach and nectarine trees, and can reduce tree vigor, fruit quality and yield. Learn symptoms and management options in this factsheet.
Fire blight is the most destructive bacterial disease affecting plants in the rose family, including apple, pear, crabapple, hawthorn, cotoneaster, mountain ash, quince, rose, pyracantha, and spirea. Learn more here.
The downy mildews are a group of fungal diseases that cause destruction of the leaves, stems, flowers and fruits of many plants, including grapes, cucumbers and roses. Learn symptoms and controls in this factsheet.
Apple scab is a potentially serious fungal disease of ornamental and fruit trees in the rose family. This factsheet describes symptoms, management and control of this sometimes serious disease.