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Commercial Vegetable Production in Wisconsin—2024
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...
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Biological Control of Insects and Mites: An Introduction to Beneficial Natural Enemies and Their Use in Pest Management
Author(s) Daniel L. Mahr, Paul Whitaker, Nino Ridgway. This colorful, richly illustrated booklet offers an introduction to beneficial natural ene...
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Tomato and Pepper Disorders: Bacterial Spot and Speck
Author(s) Karen Delahaut, Walt Stevenson. Bacterial spot and speck are found wherever tomatoes or peppers are grown. On occasion, these diseases ...
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Brown Marmorated Stink Bug: An Invasive Insect Pest
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...
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Tomato Disorders: Fusarium and Verticillium Wilts
Author(s) Karen Delahaut, Walt Stevenson. Fusarium and Verticillium wilts once routinely devastated tomato crops. However, the availability of res...
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Tomato Disorder: Physiological Fruit Problems
Author(s) Karen Delahaut, Walt Stevenson. Environmental factors can affect the look—and sometimes the flavor—of developing tomato fruits. Because ...
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Biological Control of Insects and Other Pests of Greenhouse Crops
Author(s) Susan E. Rice Mahr, Raymond A. Cloyd, Daniel L. Mahr, Clifford S. Sadof. Greenhouse managers wage ongoing battles with insect pests. Thi...
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Vine Crops Disorder: Angular Leaf Spot
Author(s) Karen Delahaut, Walt Stevenson. Angular leaf spot is a bacterial disease that can be economically damaging to cucumbers, honeydew melon,...
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Vine Crops Disease: Phytophthora Blight
Author(s) Karen Delahaut, Walt Stevenson. Phytophthora blight is a fungal disease capable of completely destroying zucchini, pumpkin, summer squas...
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Tomato Late Blight
Author(s) Amanda Gevens, Jaime Wilbur. Late blight can result in complete destruction of tomato crops if left unmanaged. Learn about the symptoms...
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Tomato Disorders: Early Blight and Septoria Leaf Spot
Author(s) Karen Delahaut, Walt Stevenson. Both early blight and Septoria leaf spot are potentially serious diseases that affect the leaves, stems,...
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Potato Late Blight
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 ...
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Managing Insects in the Home Vegetable Garden
Author(s) J. A. Wyman, P. J. Pellitteri. Insect illustrations aid you in identifying garden pests. Descriptions of cultural, mechanical, and chem...
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Aster Leafhopper
Author(s) K. A. Delahaut Aster leafhoppers feed on vegetables, field crops, flowers and weeds, spreading aster yellows disease. Learn when to scou...
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European Corn Borer
Author(s) Eileen M. Cullen, John Wedberg. This fact sheet details the life cycle of the European corn borer, or Ostrinia nubilalis, including the ...
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Corn Rootworms
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,...
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Corn Earworm
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...
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Contaminantes en los suelos de jardines comunitarios
Author(s) John Folstad, Sharon C. Long, Doug Soldat, Geoff Siemering. As interest in community gardening continues to grow, more and more gardens...
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Japanese Beetles
Author(s) R. Chris Williamson. This fact sheet on the Japanese beetle, considered the single most important turf grass pest in the United States ...
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Soil Contaminants in Community Gardens
Author(s) John Folstad, Sharon C. Long, Doug Soldat, Geoff Siemering. As interest in community gardening continues to grow, more and more gardens...
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Seed Corn Maggot
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...
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Wireworms
Author(s) K. A. Delahaut. Wireworms can damage a host of plants in home and commercial gardens alike, including corn and small grains, vegetables ...
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Vine Crops Disorder: Scab
Author(s) Karen Delahaut, Walt Stevenson. Scab, also called gummosis, is one of the most important diseases affecting vine crops. In cool moist e...
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Vine Crops Disorder: Powdery Mildew
Author(s) Karen Delahaut, Walt Stevenson. Powdery mildew is a foliar disease that occurs late in the season on cucumbers, gourds, muskmelons, pump...
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Vine Crops Disorder: Bacterial Wilt
Author(s) Karen Delahaut, Walt Stevenson. Bacterial wilt, caused by Erwinia tracheiphila, is a destructive vascular disorder spread by cucumber be...
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Vine Crops Disorder: Anthracnose
Author(s) Karen Delahaut, Walt Stevenson. Anthracnose is a destructive fungal disease of the foliage, stems, and fruit of cucumbers, gourds, muskm...
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Vegetable Leafminers
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...
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Vegetable Aphids
Author(s) K. A. Delahaut. This fact sheet covers vegetable aphids, including the bean, pea, green peach, melon, potato, cabbage, and corn leaf ap...
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Tomato Disorder: Post-Harvest Fruit Diseases
Author(s) Karen Delahaut, Walt Stevenson. Even though symptoms may not appear until after harvest, many of the disease-causing organisms that caus...
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Squash Vine Borer
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...
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Squash Bug
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...
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Potato Leafhopper
Author(s) K. A. Delahaut. In Wisconsin, the potato leafhopper (Empoasca fabae) is a serious annual pest of snap beans and potatoes. Damage caused ...
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Potato Disorders: Common Scab and Powdery Scab
Author(s) Karen Delahaut, Walt Stevenson. Two distinctly separate diseases commonly known as scab can infect potatoes, significantly reducing tube...
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Onion Thrips
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...
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Onion Maggot
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 ...
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Onion Disorders: Botrytis Leaf Blight, Leaf Fleck, and Neck Rot
Author(s) Karen Delahaut, Walt Stevenson. Three types of botrytis diseases affect onion crops. Botrytis leaf blight is a destructive disease cause...
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Onion Disorder: Soft Rot
Author(s) Karen Delahaut, Walt Stevenson. Bacterial decay, known as soft rot, is one of the most widespread and destructive storage diseases of on...
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Onion Disorder: Smut
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...
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Onion Disorder: Purple Blotch
Author(s) Karen Delahaut, Walt Stevenson. Purple blotch causes onion leaves to become blighted and die prematurely. The result is reduced yields f...
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Onion Disorder: Fusarium Basal Rot
Author(s) Karen Delahaut, Walt Stevenson. This disease, caused by the common soil fungus Fusarium oxysporum f. sp. cepae, can be found wherever on...
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Onion Disease: Downy Mildew
Author(s) Karen Delahaut, Walt Stevenson. Downy mildew is a destructive disease that can reduce yield and bulb quality of onions, garlic, leeks, s...
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Insect Pest Management for Greenhouses
Author(s) R. Chris Williamson, Samuel Soper, P. J. Liesch. This handy chart lists pesticides that are most effective against common greenhouse pes...
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Hornworms
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...
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Handbook of Pea Diseases
Author(s) D. J. Hagedorn. This guide provides essential scientific information and meaningful visual guidance regarding the most common diseases ...
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Cucurbit Downy Mildew: Identification and Management
Author(s) Amanda Gevens, Michelle Marks. Cucurbit downy mildew is a destructive disease of all plants in the gourd family, including cucumber, wa...
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Cucumber Beetles
Author(s) K. A. Delahaut. Spotted and striped cucumber beetles damage vine crops like cucumbers, squash, watermelons, muskmelons, and pumpkins. Th...
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Corn Disorders: Smut and Rust
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...
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Colorado Potato Beetle
Author(s) K. A. Delahaut This publication is packed with practical information for organic and conventional growers who encounter Colorado potato ...
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