Diseases- Weeds- Insects & Other Problems-C280

Author(s) Karen Delahaut, Walt Stevenson. Three types of botrytis diseases affect onion crops. Botrytis leaf blight is a destructive disease cause...

Author(s) Karen Delahaut, Walt Stevenson. Bacterial decay, known as soft rot, is one of the most widespread and destructive storage diseases of on...

Author(s) Karen Delahaut, Walt Stevenson. Onion smut can be a serious disease of onions, leeks, and shallots. The disease is caused by the fungi U...

Author(s) Karen Delahaut, Walt Stevenson. Purple blotch causes onion leaves to become blighted and die prematurely. The result is reduced yields f...

Author(s) Karen Delahaut, Walt Stevenson. This disease, caused by the common soil fungus Fusarium oxysporum f. sp. cepae, can be found wherever on...

Author(s) Karen Delahaut, Walt Stevenson. Downy mildew is a destructive disease that can reduce yield and bulb quality of onions, garlic, leeks, s...

Author(s) Claire Strader, Julie Dawson. One of the most common criticisms of organic agriculture is that it relies too heavily on tillage. While o...

Author(s) R. Chris Williamson. This fact sheet on the Japanese beetle, considered the single most important turf grass pest in the United States ...

Author(s) R. Chris Williamson, Samuel Soper, P. J. Liesch. This handy chart lists pesticides that are most effective against common greenhouse pes...

Author(s) K. A. Delahaut. Tomato and tobacco hornworms feed on tomatoes late in the season. This fact sheet details the insects' life cycle, the d...

Author(s) Jed Colquhoun. When a weed species becomes resistant to a herbicide, it eliminates an entire class of available products. For commercial...

Author(s) D. J. Hagedorn. This guide provides essential scientific information and meaningful visual guidance regarding the most common diseases ...

Author(s) K. A. Delahaut. Wireworms can damage a host of plants in home and commercial gardens alike, including corn and small grains, vegetables ...

Author(s) Karen Delahaut, Walt Stevenson.  Scab, also called gummosis, is one of the most important diseases affecting vine crops. In cool moist e...

Author(s) Karen Delahaut, Walt Stevenson. Powdery mildew is a foliar disease that occurs late in the season on cucumbers, gourds, muskmelons, pump...

Author(s) Karen Delahaut, Walt Stevenson. Bacterial wilt, caused by Erwinia tracheiphila, is a destructive vascular disorder spread by cucumber be...

Author(s) Karen Delahaut, Walt Stevenson. Anthracnose is a destructive fungal disease of the foliage, stems, and fruit of cucumbers, gourds, muskm...

Author(s) K. A. Delahaut.  Leafminers are the larval stage of flies, moths, sawflies, and beetles that often cause damage to leafy edible plants s...

Author(s) K. A. Delahaut.  This fact sheet covers vegetable aphids, including the bean, pea, green peach, melon, potato, cabbage, and corn leaf ap...

Author(s) Karen Delahaut, Walt Stevenson. Even though symptoms may not appear until after harvest, many of the disease-causing organisms that caus...

Author(s) K. A. Delahaut.  The squash vine borer is an annual pest of pumpkins and squash. Winter squash are especially vulnerable. This fact shee...

Author(s) K. A. Delahaut. Squash bugs are a problem in Wisconsin, feeding on most vine crops such as pumpkins and squash in commercial and home ga...

Author(s) Claire Strader, Julie Dawson. One of the most common criticisms of organic agriculture is that it relies too heavily on tillage. While o...

Author(s) Karen Delahaut. The seed corn maggot (Delia platuraorganic) is a perennial pest that attacks the seeds and seedlings of a wide variety o...

Author(s) Sarah Schramm, Ken Frost, Amy Charkowski, Stewart Gray, Alex Crockford, Russell L. Groves. Potato virus Y (PVY) is an aphid-transmitted ...

Author(s) P. M. Rogers, W. R. Stevenson, J. A. Wyman, Ken Frost, Russell Groves. Each year three major foliar diseases invade Wisconsin commercial...

Author(s) Deana L. Knuteson, Walter R. Stevenson, Jeffrey A. Wyman, Alvin J. Bussan, Jed B. Colquhoun, Carrie A.M. Laboski, Erin M. Silva. Updated...

Author(s) Deana L. Knuteson, Walter R. Stevenson, Jeffrey A. Wyman, Alvin J. Bussan, Jed B. Colquhoun, Carrie A.M. Laboski. Updated for 2010 with ...