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Insect Pests

  • Gypsy Moths: Identifying and Managing Gypsy Moth Caterpillars
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    Gypsy Moths: Identifying and Managing Gypsy Moth Caterpillars

    Author(s) R. Chris Williamson, Andrea Diss The gypsy moth caterpillar has a distinctively bristly body, with five pairs of blue warts followed by ...

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  • Euonymus Caterpillar
    $1.00

    Euonymus Caterpillar

    Author(s) K. A. Delahaut In Wisconsin, the euonymus caterpillar Yponomeuta cagnagella damages the spindletree euonymus, the winged euonymus (also ...

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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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  • Deciduous Tree Disorder: Cankerworms
    $1.00

    Deciduous Tree Disorder: Cankerworms

    Author(s) P. J. Pellitteri, D. L. Mahr, D. J. Hall Severe, early season defoliation of several hardwood species may be caused by spring or fall ca...

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  • Deciduous Tree and Shrub Disorder: Skeletonizing by Rose Chafer
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    Deciduous Tree and Shrub Disorder: Skeletonizing by Rose Chafer

    Author(s) R. C. Williamson, C. F. Koval Skeletonizing of the leaves of roses, raspberries, grapes, fruit trees, and many other cultivated trees an...

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  • Birch Leafminer
    $1.00

    Birch Leafminer

    Author(s) P. J. Pellitter Birch leafminers are insects that can destroy the leaves of all ornamental birch varieties grown in Wisconsin. European,...

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  • Birch Disorder: Bronze Birch Borer
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    Birch Disorder: Bronze Birch Borer

    Author(s) R. C. Williamson, P. J. Pellitteri The bronze birch borer is a serious pest of birch trees in the Midwest. It can severely injure or kil...

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  • Ash Plant Bug
    $1.00

    Ash Plant Bug

    Author(s) P. J. Pellitteri, C. F. Koval A small insect called the ash plant bug attacks ash trees in June and July, causing thin, discolored, spot...

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  • Linden Borer
    $1.00

    Linden Borer

    Author(s) C. A. Johnson, R. C. Williamson The linden borer (Saperda vestita Say) is a native insect found throughout northeastern North America th...

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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 b...

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  • Honeysuckle Disorder: Honeysuckle Leaffolding Aphid
    $1.00

    Honeysuckle Disorder: Honeysuckle Leaffolding Aphid

    Author(s) C. F. Koval, D. L. Mahr Landscapers and nursery operators in Wisconsin long considered honeysuckle a low-maintenance plant. The arrival ...

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  • Honeylocust Disorder: Plantbugs and Leafhoppers
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    Honeylocust Disorder: Plantbugs and Leafhoppers

    Author(s) K. A. Delahaut The honeylocust has become an increasingly important street and landscape tree in Wisconsin. Finer textured and less form...

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  • Gypsy Moths: Selecting a Pesticide for Gypsy Moth Control
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    Gypsy Moths: Selecting a Pesticide for Gypsy Moth Control

    Author(s) R. Chris Williamson, Andrea Diss Many insecticides are available to control gypsy moth; however, not all are created equal. Before you b...

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  • Gypsy Moths: Identifying and Managing Gypsy Moth Egg Masses
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    Gypsy Moths: Identifying and Managing Gypsy Moth Egg Masses

    Author(s) R. Chris Williamson, Andrea Diss Gypsy moth egg masses contain all the eggs a female moth produces. Each destroyed egg mass represents h...

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  • Gypsy Moth
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    Gypsy Moth

    Author(s) R. Chris Williamson This fact sheet covers the highly destructive gypsy moth, detailing its life cycle, the destruction it causes, and t...

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  • Oak Disorder: Twolined Chestnut Borer
    $1.80

    Oak Disorder: Twolined Chestnut Borer

    Author(s) C. F. Koval, M. F. Heimann Oak trees that are dying from the top down or exhibiting drought-like symptoms may be infested with the twoli...

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  • Maple Petiole Borer
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    Maple Petiole Borer

    Author(s) P. J. Pellitteri, D. L. Mahr The maple petiole borer is an introduced species that has extended its range from the northeastern states t...

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  • Maple Gall Mites
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    Maple Gall Mites

    Author(s) P. J. Pellitteri, C. F. Koval, D. L. Mahr Maple leaves frequently develop growths or swellings known as galls. These are caused by micro...

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  • Maple and Other Trees Disorder: Cottony Maple Scale
    $1.00

    Maple and Other Trees Disorder: Cottony Maple Scale

    Author(s) C. F. Koval, D. L. Mahr, P. J. Pellitteri Cottony maple scale is an insect that can infest the twigs of maples and other shade trees wit...

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  • Woody Ornamentals Pest Management in Wisconsin
    $4.50

    Woody Ornamentals Pest Management in Wisconsin

    Author(s) Chris Williamson, P.J. Liesch, Jim Kerns, Roger Flashinski Woody Ornamentals Pest Management in Wisconsin is an indispensable resource f...

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    $4.50