Insect Hotline Issue 20

close cluster magnolia scalehoneydew drop

Magnolia scale on star magnolia trees.  Notice the drop of honeydew about to fall from the swelling female on the right.  Dark patches on the trunk are sooty mold growing on the honeydew.

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Tuliptree scale on tulip popular.  This scale also produces copious amounts of honeydew and looks very similar to magnolia scale.  Microscopic investigation reveals which species.  Crawlers are active for both species about the same time and scouting is crucial to know when they are active.  Use GDD to target ideal scouting times.

Mealybug destroyer on scale

The white waxy insect in this picture is a lady beetle larva feeding on the adult scales.  All pictures were taken by:  Brian Kunkel, Ornamentals IPM Extension Specialist, University of Delaware

Insect Hotline Issue 12

 

 

 

 

 

Cottony maple scale on a tulip tree.

 

 

 

 

 

 

 

Cottony maple leaf scale on dogwood.

 

 

 

 

Cottony camellia/taxus scale on holly.  The first and third picture was provided by:  Brian A. Kunkel, University of Delaware Ornamentals IPM Extension Specialist.  Cottony maple leaf scale image was provided by:  Nancy Gregory, University of Delaware Plant Diagnostician.

What’s Hot HL Issue 11?

 

 

 

 

Indian wax scale on winterberry.

 

 

 

 

 

Ovisacs of cottony maple scale on maple tree.

 

 

 

 

Close-up of ovisac of cottony maple scale.  Photos provided by:  Brian A. Kunkel, University of Delaware Ornamentals IPM Extension Specialist

Insect Hotline Issue 14


Fletcher scale on bald cypress.

Close-up of lecanium scale on cypress.

Close-up of lecanium eggs.

Lecanium scale on oaks. All photos provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

What’s Hot HL Issue 24


Tuliptree scale adults. Photo provided by: Lacy L. Hyche, Auburn University, Bugwood.org

European hornet damage. Photo provided by: John A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org

European hornet damage and adult. Photo provided by: Jim Baker, North Carolina State University, Bugwood.org

Oriental bittersweet foliage. Photo provided by: James H. Miller, USDA Forest Service, Bugwood.org

Oriental bittersweet berries. Photo provided by: Chris Evans, River to River CWMA, Bugwood.org

Multiflora rose infestation. Photo provided by: Nancy Fraley, USDI National Park Service, Bugwood.org

Close-up of multiflora rose plant. Photo provided by: Chris Evans, River to River CWMA, Bugwood.org

Mulitflora rose flowers. Photo provided by: John M. Randall, The Nature Conservancy, Bugwood.org

Multiflora rose berries. Photo provided by: Barry Rice, sarracenia.com, Bugwood.org

Insect Hotline Issue 17


European fruit lecanium on blueberry. Photo provided by: Jerry A. Payne, USDA Agricultural Research Service, Bugwood.org.

Fletcher scale. Photo provided by: Whitney Cranshaw, Colorado State University, Bugwood.org.

Lecanium scales on Celtis laevigata. Photo provided by: James Solomon, USDA Forest Service, Bugwood.org.