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Evergreens Condition: Seasonal Needle Drop
Author(s) M. F. Heimann, P. J. Pellitteri Despite their name, evergreen needles do not stay green forever. Older, inner needles discolor and drop ...
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Effects of Flooding on Woody Landscape Plants
Author(s) Laura G. Jull Plant roots, like people, need oxygen for respiration. That why a flood can stress a plant and even, if roots are submerge...
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Deciduous Trees Disorder: Springtime Weather Injury to Foliage
Author(s) M. F. Heimann, G. L. Worf Springtime weather injury can cause misleading symptoms on foliage. This fact sheet describes symptoms and ste...
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Deciduous Trees Disorder: Miscellaneous Causes of Decline
Author(s) G. L. Worf., J. E. Kuntz Many problems and disorders can lead to tree decline. This fact sheet explores sun scald, girdling roots, mower...
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Deciduous Tree and Shrub Disorder: Skeletonizing by Rose Chafer
Author(s) R. C. Williamson, C. F. Koval Skeletonizing of the leaves of roses, raspberries, grapes, fruit trees, and many other cultivated trees an...
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Japanese Beetles
Author(s) R. Chris Williamson This fact sheet on the Japanese beetle, considered the single most important turf grass pest in the United States b...
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Tree and Shrub Fertilization
Author(s) E. R. Hasselkus, E. E. Schulte Explains what fertilizer you should use and how you should apply it to your deciduous trees, evergreens, ...
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Spruce Disorder: Spruce Gall Adelgids
Author(s) R. C. Williamson, P. J. Pellitteri Tiny aphid-like insects frequently cause unusual swellings called galls at or near the ends of spruce...
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Sooty Mold
Author(s) M. F. Heimann, G. L. Worf, P. J. Pellitteri Sooty mold can be found on virtually any plant in the state. Nearly all shade trees and ever...
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Russian Olive Disorder: Phomopsis Canker
Author(s) G. L. Worf, J. S. Stewart Russian olive (Elaeagnus angustifolia) is a small tree with beautiful, silver-gray foliage. The tree was once ...
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Preserving Trees During Construction
Author(s) Stan Binnie Home construction can easily damage or even kill prized and valuable landscape trees. Learn the simple steps of safely prote...
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Pine Needle Diseases: Brown Spot and Lophodermium Needlecast
Author(s) M. F. Heimann, G. R. Stanosz, G. L. Worf These two needle diseases can make Christmas trees unmarketable and can ruin the beauty of Scot...
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Mountain Ash Disorder: Sunscald-Fungal Canker Complex
Author(s) M. F. Heimann, G. L. Worf Physical damage to the trunk—caused by sunscald or even lawn mower damage—opens the way for a fungal infection...
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Mountain Ash Disorder: Scab
Author(s) M.F. Heimann, G.R. Stanosz, G.L. Worf Mountain ash scab is not always a serious problem in Wisconsin, but in wet years it can reach near...
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Mountain Ash Disorder: Fire Blight
Author(s) M.F. Heimann, G.L. Worf Fire blight sometimes causes dramatic and serious damage, blackening leaves and either the vegetative shoots or ...
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Maple Petiole Borer
Author(s) P. J. Pellitteri, D. L. Mahr The maple petiole borer is an introduced species that has extended its range from the northeastern states t...
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Maple Gall Mites
Author(s) P. J. Pellitteri, C. F. Koval, D. L. Mahr Maple leaves frequently develop growths or swellings known as galls. These are caused by micro...
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Maple and Other Trees Disorder: Cottony Maple Scale
Author(s) C. F. Koval, D. L. Mahr, P. J. Pellitteri Cottony maple scale is an insect that can infest the twigs of maples and other shade trees wit...
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Linden Borer
Author(s) C. A. Johnson, R. C. Williamson The linden borer (Saperda vestita Say) is a native insect found throughout northeastern North America th...
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Honeysuckle Disorder: Honeysuckle Leaffolding Aphid
Author(s) C. F. Koval, D. L. Mahr Landscapers and nursery operators in Wisconsin long considered honeysuckle a low-maintenance plant. The arrival ...
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Honeylocust Disorder: Plantbugs and Leafhoppers
Author(s) K. A. Delahaut The honeylocust has become an increasingly important street and landscape tree in Wisconsin. Finer textured and less form...
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Harvesting Firewood from Your Woods
Author(s) William Klase, Kris Tiles Which trees yield the best firewood? What are the steps in properly harvesting trees? How about splitting and...
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Gypsy Moths: Selecting a Pesticide for Gypsy Moth Control
Author(s) R. Chris Williamson, Andrea Diss Many insecticides are available to control gypsy moth; however, not all are created equal. Before you b...
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Gypsy Moths: Identifying and Managing Gypsy Moth Egg Masses
Author(s) R. Chris Williamson, Andrea Diss Gypsy moth egg masses contain all the eggs a female moth produces. Each destroyed egg mass represents h...
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