Common Corn Smut

Tianna Jordan*, UW-Madison Plant Pathology Revised:  6/19/2013 Item number:  XHT1221 What is common corn smut?  Common corn smut is a fungal disease that affects field, pop, and sweet corn, as well as the corn relative teosinte (Zea mexicana).  Common corn smut is generally not economically significant except in sweet corn where relatively low levels of […]


Joe Spraker, UW-Madison Plant Pathology Revised:  6/7/2013 Item number:  XHT1230 What is huitlacoche?  Huitlacoche is the Native American name for the mushroom-like masses found on the ears of corn and corn relatives (collectively called teosinte).  Huitlacoche can be a major problem for sweet corn growers where it is referred to as common corn smut (see […]

Black Rot of Crucifers

Andrew Pape, UW-Madison Plant Pathology Revised:  6/14/2013 Item number:  XHT1225 What is black rot?  Black rot is a potentially lethal bacterial disease that affects cruciferous vegetables such as broccoli, Brussels sprouts, cabbage, cauliflower, kale, rutabaga and turnip, as well as cruciferous weeds such as shepherd’s purse and wild mustard.  Black rot occurs worldwide wherever cruciferous […]

Home Garden Fungicides

Amanda Gevens, Ken Cleveland and Lauren Thomas, UW Madison – Plant Pathology Revised:  5/30/2012 Item number:  XHT1211 Diseases of vegetable plants can pose a challenge for the home gardener.  Typically, cultural methods are the preferred options for disease management in home vegetable gardens.  Cultural methods include proper site selection, plant spacing, staking, watering, fertilization, 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

Vine Crops Disorder: Scab

Karen Delahaut, Walt Stevenson Revised:  10/24/2011 Item number:  A3282 Scab, also called gummosis, is one of the most important diseases affecting vine crops. In cool moist environments, scab can be a yield- limiting disease. While the pathogen infects a broad range of vine crops including pumpkins, squash, and melons, it is rarely a problem on […]

Vine Crops Disorder: Powdery Mildew

Karen Delahaut, Walt Stevenson Revised:  10/24/2011 Item number:  A3805 Powdery mildew is a foliar disease that occurs late in the season on cucumbers, gourds, muskmelons, pumpkins, and squash. It is less common on watermelon. On susceptible crops, this disease is often severe enough to significantly reduce yields by reducing the number and size of fruit. […]

Vine Crops Disorder: Anthracnose

Karen Delahaut, Walt Stevenson Revised:  10/24/2011 Item number:  A3279 Anthracnose is a destructive fungal disease of the foliage, stems, and fruit of cucumbers, gourds, muskmelons, and watermelons. Find out how to spot, prevent, and control this disorder in your garden. Click on links to read this publication.   Download Article

Vine Crops Disorder: Angular Leaf Spot

Karen Delahaut, Walt Stevenson Revised:  10/24/2011 Item number:  A3801 Angular leaf spot is a bacterial disease that can be economically damaging to cucumbers, honeydew melon, and zucchini squash grown in Wisconsin. The bacterium Pseudomonas syringae pv. lachrymans infects leaves, stems, and fruit. Read this fact sheet to find out how to spot, prevent, and control […]

Vine Crops Disease: Phytophthora Blight

Vine Crops Disease: Phytophthora Blight Revised:  10/24/2011 Item number:  A3834 Phytophthora blight is a fungal disease capable of completely destroying zucchini, pumpkin, summer squash, and watermelon fields and seriously damaging other vine crops. This fact sheet describes the symptoms and effects, disease cycle, and control methods. Click on links to read this publication.   Download […]

Tomato Disorder: Post-Harvest Fruit Diseases

Karen Delahaut, Walt Stevenson Revised:  10/24/2011 Item number:  A3799 Even though symptoms may not appear until after harvest, many of the disease-causing organisms that cause fruit rot infect tomatoes before they ripened. Once fruit is infected, little can be done during harvest or storage to reduce the damage. Most fruit rot fungi and bacteria also […]

Tomato Disorder: Physiological Fruit Problems

Karen Delahaut, Walt Stevenson Revised:  8/6/2012 Item number:  A3798 Environmental factors can affect the look—and sometimes the flavor—of developing tomato fruits. Because these problems are not caused by disease organisms, there are no pesticide recommendations for prevention or management. This 4-page publication briefly covers blossom end rot, blotchy ripening, catfacing, growth cracks, puffiness, and sunscald. […]

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