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Diseases- Weeds- Insects & Other Problems-C289

  • Apple Maggot
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    Apple Maggot

    Author(s) Annie Deutsch, Christelle Guédot. Apple maggot, also commonly known as railway worm, is a significant pest of apples in commercial and b...

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  • Apple, Pear, and Other Related Trees Disorder: Fire Blight
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    Apple, Pear, and Other Related Trees Disorder: Fire Blight

    Author(s) P. S. McManus, Teryl R. Roper. Learn to recognize the symptoms of fire blight. Suggests ways to prevent and manage this serious disease...

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  • Codling Moth
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    Codling Moth

    Author(s) Janet van Zoeren, Christelle Guédot. Codling moth is an insect pest of apple, pear, and walnut crops in Wisconsin. Larval feeding can re...

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  • Walnut and Butternut Toxicity
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    Walnut and Butternut Toxicity

    Author(s) M. F. Heimann, W. R. Stevenson. Black walnut (Juglans nigra) and butternut (Juglans cinerea) trees produce a toxin called juglone capabl...

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  • Apple, Flowering Crab, Hawthorn, Juniper Disorder: Cedar-Rust Complex
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    Apple, Flowering Crab, Hawthorn, Juniper Disorder: Cedar-Rust Complex

    Author(s) M. F. Heimann, G. L. Worf Cedar-rust complex is caused by a fungus that requires two hosts—juniper plus apple, crabapple, hawthorn, or ...

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  • Brown Marmorated Stink Bug: An Invasive Insect Pest
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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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  • Apple Disorder: Sooty Blotch and Flyspeck
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    Apple Disorder: Sooty Blotch and Flyspeck

    Author(s) P. S. McManus, M. F. Heimann Sooty blotch and flyspeck are separate diseases that often occur together on apple and pear fruit during l...

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  • Eastern Tent Caterpillar
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    Eastern Tent Caterpillar

    Author(s) C. F. Koval, S. W. Binnie. The eastern tent caterpillar is native to North America, and records of its existence go back as far as 1646....

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  • Plum Curculio
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    Plum Curculio

    Author(s) Annie Deutsch, Christelle Guédot. Plum curculio, a beetle native to the midwestern United States, is one of the most common and detrimen...

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  • Watercore of Apple
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    Watercore of Apple

    Author(s) T. R. Roper. Watercore of apple is a physiologic disorder. The fruit tissue abnormal condition is a response of some apple cultivars to...

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