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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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