Root-Knot Nematode

Root-knot nematodes (Meloidogyne spp.) are small, soilborne, worm-like organisms that infect many agricultural and horticultural plants. This publication describes the symptoms, management and control of root-knot nematodes in Wisconsin.

Foliar Nematodes

Foliar nematodes are microscopic worm-like organisms in the genus Aphelenchoides. They live in and on the leaves (and other above-ground plants parts) of over 450 plant species in more than 75 plant families. They are commonly found on hostas, but can affect other herbaceous ornamentals. Learn what to look for and how to manage foliar nematodes in this factsheet.

May/June Beetles

May/June beetles or “Junebugs” (Phyllophaga spp.) are beetles in the family Scarabaeidae. These native insects are common throughout Wisconsin and can often be seen flying near lights or heard hitting window screens on early summer evenings. Learn more about these large beetles and their larva, found in the soil, in this factsheet.

Brown Marmorated Stink Bug

Christelle Guédot, UW-Madison Entomology and Bryan Jensen, UW IPM Program Revised:  3/26/2014 Item number:  XHT1236 Brown marmorated stink bug (BMSB), Halymorpha halys, is an exotic, invasive insect native to Asia, including China, Japan, Korea and Taiwan.  BMSB was first confirmed in the United States in 2001 although an unconfirmed sighting was reported in Pennsylvania in […]

Thousand Cankers Disease

Karen Schlichter, UW-Madison Plant Pathology Revised:  1/22/2014 Item number:  XHT1228 What is thousand cankers disease?  Thousand cankers disease (TCD) is a serious, potentially fatal disease of black walnut (Juglans nigra), a tree native to Wisconsin.  TCD has not yet been reported in Wisconsin, but has been found in the western United States where it was […]

Rose Rust

Robyn Roberts, UW-Madison Plant Pathology Revised:  6/8/2013 Item number:  XHT1217 What is rose rust?  Rose rust is a common fungal disease found in much of North America (including the continental United States) and Europe.  Rose rust affects many varieties of rose, though some varieties (e.g., hybrids) are more prone to the disease.  Rose rust has […]

Professional Guide to Emerald Ash Borer Insecticide Treatments

A variety of insecticide products and application methods are available to professionals for control of the emerald ash borer (EAB).  Since the presence and infestation level of EAB is quite difficult to determine at early stages of an infestation, insecticide treatments may be merited to mitigate damage by EAB.  However, not all ash trees should be treated as some may be too extensively compromised or in poor condition to receive treatment.

Protecting Your Tree From Emerald Ash Borer

R. Chris Williamson, UW Turf and Ornamental Specialist, UW-Extension and P.J. Liesch, Associate Researcher, UW-Madison Revised:  7/13/2012 The Emerald Ash Borer (EAB) is an invasive insect that is killing off Wisconsin’s ash trees. EAB was first discovered in Wisconsin in 2008 and has been slowly spreading ever since. In this short video, UW-Madison entomologists Chris […]

Drought and Watering of Ornamental Plants

Laura Jull, Woody Ornamental Specialist, UW-Extension, UW-Madison Revised:  7/13/2012 Many of our established woody ornamentals can survive periods of prolonged drought. In response to drought conditions, some of our woody ornamentals, both native and exotic, can start the annual fall leaf defoliation a bit early during prolonged drought conditions.  Leaves can also turn brown and […]

Controlling Deer Damage in Wisconsin

Scott Craven, Scott Hygnstrom, Philip Peterson Revised:  1/24/2001 Item number:  G3083 Illustrates numerous methods for protecting crops and other property from deer. Offers designs for deer fences and other constructions, along with a list of repellents and scare devices (8 pages). Download Article

Choosing Trees and Shrubs Under Powerlines

Laura Jull, UW-Extension Revised:  11/2/2011 Item number:  MG&E website This website features small trees that can be planted underneath or near powerlines, in addition to larger shrubs that can be used for screening. The search data includes plants for sun, partial shade or shade, wet, moist or dry soil, plants with showy flowers, fruit or […]

Support Extension