Diseases- Weeds- Insects & Other Problems-C102

Author(s) B. Z. Bradford, J. B. Colquhoun, S. A. Chapman, A. J. Gevens, R. L. Groves, D. J. Heider, G. R. W. Nice, M. D. Ruark, Y. Wang. Coming soo...

Author(s) Daniel L. Mahr, Paul Whitaker, Nino Ridgway. This colorful, richly illustrated booklet offers an introduction to beneficial natural ene...

Author(s) Karen Delahaut, Walt Stevenson.  Bacterial spot and speck are found wherever tomatoes or peppers are grown. On occasion, these diseases ...

Author(s) Christelle Guédot, Janet van Zoeren. In the summer of 2016, the brown marmorated stink bug (BMSB) was detected for the first time in agr...

Author(s) Karen Delahaut, Walt Stevenson. Fusarium and Verticillium wilts once routinely devastated tomato crops. However, the availability of res...

Author(s) Karen Delahaut, Walt Stevenson. Environmental factors can affect the look—and sometimes the flavor—of developing tomato fruits. Because ...

Author(s) Susan E. Rice Mahr, Raymond A. Cloyd, Daniel L. Mahr, Clifford S. Sadof. Greenhouse managers wage ongoing battles with insect pests. Thi...

Author(s) Karen Delahaut, Walt Stevenson. Angular leaf spot is a bacterial disease that can be economically damaging to cucumbers, honeydew melon,...

Author(s) Karen Delahaut, Walt Stevenson. Phytophthora blight is a fungal disease capable of completely destroying zucchini, pumpkin, summer squas...

Author(s) Amanda Gevens, Jaime Wilbur. Late blight can result in complete destruction of tomato crops if left unmanaged. Learn about the symptoms...

Author(s) Karen Delahaut, Walt Stevenson. Both early blight and Septoria leaf spot are potentially serious diseases that affect the leaves, stems,...

Author(s) Amanda Gevens, Jaime Wilbur. Late blight affects a variety of plants in the Solanaceae family but is best known for its destruction of ...

Author(s) J. A. Wyman, P. J. Pellitteri. Insect illustrations aid you in identifying garden pests. Descriptions of cultural, mechanical, and chem...

Author(s) K. A. Delahaut Aster leafhoppers feed on vegetables, field crops, flowers and weeds, spreading aster yellows disease. Learn when to scou...

Author(s) Eileen M. Cullen, John Wedberg. This fact sheet details the life cycle of the European corn borer, or Ostrinia nubilalis, including the ...

Author(s) J. L. Wedberg. This fact sheet details the life cycle of the northern, western, and southern corn rootworms, the damage they can cause,...

Author(s) K. A. Delahaut, E. M. Cullen, J. L. Wedberg. The corn earworm Helicoverpa zea can cause serious economic damage to fresh market and pro...

Author(s) John Folstad, Sharon C. Long, Doug Soldat, Geoff Siemering. As interest in community gardening continues to grow, more and more gardens...

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) John Folstad, Sharon C. Long, Doug Soldat, Geoff Siemering. As interest in community gardening continues to grow, more and more gardens...

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) 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) K. A. Delahaut. In Wisconsin, the potato leafhopper (Empoasca fabae) is a serious annual pest of snap beans and potatoes. Damage caused ...

Author(s) Karen Delahaut, Walt Stevenson. Two distinctly separate diseases commonly known as scab can infect potatoes, significantly reducing tube...

Author(s) K. A. Delahaut. Onion thrips (Thrips tabaci) are an important annual pest of onion. They may attack nearly all garden crops, but serious...

Author(s) K. A. Delahaut. Onion maggots (Hylemya antiqua) are tiny maggots that feed below ground on onion bulbs, making tunnels in the bulbs and ...

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

Author(s) Amanda Gevens, Michelle Marks. Cucurbit downy mildew is a destructive disease of all plants in the gourd family, including cucumber, wa...

Author(s) K. A. Delahaut. Spotted and striped cucumber beetles damage vine crops like cucumbers, squash, watermelons, muskmelons, and pumpkins. Th...

Author(s) Karen Delahaut, Walt Stevenson. Common smut is caused by the fungus Ustilago maydis and is the most widespread disease of sweet corn, oc...

Author(s) K. A. Delahaut This publication is packed with practical information for organic and conventional growers who encounter Colorado potato ...