Urban Forestry

Author(s) P. J. Pellitteri, D. L. Mahr, D. J. Hall Severe, early season defoliation of several hardwood species may be caused by spring or fall ca...

Author(s) R. C. Williamson, C. F. Koval Skeletonizing of the leaves of roses, raspberries, grapes, fruit trees, and many other cultivated trees an...

Author(s) K. A. Delahaut, G. L. Worf, E. R. Hasselkus In Wisconsin, scab is the most common ornamental-crabapple disease and is also the most impo...

Author(s) E. R. Hasselkus Losing a large shade tree can be a downer. This fact sheet will tell you how to minimize chances that a big old friend ...

Author(s) E. R. Hasselkus Here's sound advice on planting, watering, mulching, pruning, and maintaining flowering shrubs and other woody plants (...

Author(s) P. J. Pellitter Birch leafminers are insects that can destroy the leaves of all ornamental birch varieties grown in Wisconsin. European,...

Author(s) R. C. Williamson, P. J. Pellitteri The bronze birch borer is a serious pest of birch trees in the Midwest. It can severely injure or kil...

Author(s) P. J. Pellitteri, C. F. Koval A small insect called the ash plant bug attacks ash trees in June and July, causing thin, discolored, spot...

Author(s) Stan Binnie Home construction can easily damage or even kill prized and valuable landscape trees. Learn the simple steps of safely prote...

Author(s) M. F. Heimann, R. C. Newman When the herbicides used to kill broadleaf weeds in the lawn are applied on windy or hot days, they may end ...

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...

Author(s) P. J. Pellitteri, D. L. Mahr, D. J. Hall Early season defoliation of pines in southern Wisconsin may be attributed to European pine sawf...

Author(s) Jane Cummings Carlson, A. Jeff Martin, Kyoko Scanlon Thousands of oaks in woodland and urban settings die every year from oak wilt, a fu...

Author(s) C. F. Koval, M. F. Heimann Oak trees that are dying from the top down or exhibiting drought-like symptoms may be infested with the twoli...

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...

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...

Author(s) M.F. Heimann, G.L. Worf Fire blight sometimes causes dramatic and serious damage, blackening leaves and either the vegetative shoots or ...

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...

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...

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...

Author(s) C. A. Johnson, R. C. Williamson The linden borer (Saperda vestita Say) is a native insect found throughout northeastern North America th...

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...

Author(s) C. F. Koval, D. L. Mahr Landscapers and nursery operators in Wisconsin long considered honeysuckle a low-maintenance plant. The arrival ...

Author(s) K. A. Delahaut The honeylocust has become an increasingly important street and landscape tree in Wisconsin. Finer textured and less form...