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Diseases- Weeds- Insects & Other Problems-C280

  • European Corn Borer
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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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  • Cucurbit Downy Mildew: Identification and Management
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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
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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 Rootworms
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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
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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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  • Corn Disorders: Smut and Rust
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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
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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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  • Potato Leafhopper
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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
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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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  • Plastic, Fabric, and Marsh Hay Mulch with No-Till Organic Tomatoes
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    Plastic, Fabric, and Marsh Hay Mulch with No-Till Organic Tomatoes

    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...

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  • Onion Thrips
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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
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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
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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
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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
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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
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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
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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
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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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  • Living Aisles under Organic Acorn Squash and Brussels Sprouts
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    Living Aisles under Organic Acorn Squash and Brussels Sprouts

    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...

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  • Japanese Beetles
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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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  • Insect Pest Management for Greenhouses
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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
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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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  • Herbicide Resistance Management in Vegetable Rotations
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    Herbicide Resistance Management in Vegetable Rotations

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

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  • Handbook of Pea Diseases
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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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