Magnolia Scale
Magnolia scale sucks plant sap and excretes drippy, sticky honeydew which can turn black with mold growth. Learn more, including control, in this factsheet.
Deciduous Trees & Shrubs
Trees and shrubs are the backbone of our landscapes. Properly placed and well-maintained landscape plants help conserve energy, provide shade, increase the property values, attract wildlife, offer privacy and help us create peaceful outdoor living environments. Many trees and shrubs also exhibit showy flowers, vibrant fall foliage colors, and edible fruits. Learn from our publications and fact sheets about selecting, planting and maintaining trees and shrubs in Wisconsin landscapes.
Featured Tree & Shrub Articles
Choosing the Right Landscape Plants: Factors to Consider
Plant selection is one of the most important decisions a gardener, landscaper or designer makes. Learn more about selecting plants in this publication.
Is My Ash Tree Worth Treating for Emerald Ash Borer?
When should I treat my ash tree for EAB? This factsheet addresses some of the most frequently asked questions regarding the treatment of ash trees for EAB, and the removal and disposal of infested trees.
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Articles
Guignardia Leaf Spot
Guignardia leaf spot is a fungal leaf spot that affects vining plants such as Boston ivy and Virginia-creeper, and is associated with a leaf spot and fruit rot of grape called black rot. Learn more here.
Golden Canker (Cryptodiaporthe Canker)
Golden canker is a visually distinct and common disease of alternate-leafed dogwoods such as pagoda dogwood, which can be lethal if on the main trunk of a tree. Learn more in this factsheet.
Euonymus Scale
Euonymus scale attacks evergreen shrub and vine forms of euonymus, along with privet, bittersweet and pachysandra. Learn to identify and manage euonymus scale in this factsheet.
Dutch Elm Disease
Dutch elm disease is a lethal fungal disease of native elms. This factsheet describes symptoms, spread and management of this serious disease.
Boxelder Bugs
Though not really harmful to plants, box elder bugs become a nuisance when coming indoors in fall. This factsheet describes the life cycle and habits of box elder bugs.
Black Walnut Toxicity
Black walnut trees produce a toxic substance (called juglone) that prevents many plants from growing under or near them. Learn more about this compound and how to work around it in this factsheet.
Ash Flower Gall
Tiny eriophyid mites can cause male flowers and leaf distortions on ash trees. While unsightly, tree health is not adversely affected. Learn more here.
Bacterial Blight
Bacterial blight is a disease of Chinese, Japanese, Persian and common lilac, as well as apple, pear, plum and cherry. This factsheet describes symptoms and management of this common disease.
Ash Yellows
Ash yellows is a chronic disease of ash trees, especially white ash, causing unusual leaf growth and witches brooms. It can also affect lilacs. Learn about this unusual disease in this factsheet.
Black Knot
Black knot is a disfiguring and potentially lethal disease of trees and shrubs in the genus Prunus, such as plums and cherries. This factsheet describes symptoms and management.
Controlling Carpenter Ants
Large black ants in your home may be carpenter ants. This helpful publication will help you identify and control these household pests.
