What’s Hot HL Issue 15?

Yucca plant bug adult.  Photo provided by:  Jim Baker, North Carolina State University, Bugwood.org

 

 

Serpentine leaf miner on Magnolia.  Photo by:  Patti Kunkel

 

 

 

Redheaded flea beetle adult on Joe Pye weed.

 

 

 

Close-up of redheaded flea beetle adult.  Photo by:  Brian A. Kunkel, University of Delaware, Ornamentals IPM Extension Specialist

 

 

 

Palestriped flea beetle on cabbage.  Photo provided by:  Brian A. Kunkel, University of Delaware, Ornamentals IPM Extension Specialist

 

 

 

Invasive Insects to WATCH for because there are no recorded instances in Delaware yet!!

Ash trees with thinning canopies due to EAB feeding.  Photo provided by:  Brian A. Kunkel, University of Delaware

 

 

Epicormic growth and thinning canopy resulting from EAB feeding.  Photo provided by:  Eric R. Day, Virginia Polytechnic Institute and State University, Bugwood.org

 

 

 

 

Emerald Ash Borer (EAB) adult.  Photo provided by:  Debbie Miller, USDA Forest Service, Bugwood.org

 

 

 

Split bark on trunk or branches of ash trees may indicate the presence of EAB.  Photo provided by:  Brian A. Kunkel, University of Delaware

 

 

 

 

 

Notice the serpentine tunnels caused by EAB feeding.  Larva is next to the tip of the finger.  Tunnels are directly underneath the bark of the tree and are packed with frass.  Photo provided by:  Brian A. Kunkel, University of Delaware

 

 

 

 

Oviposition scar caused by female Asian longhorn beetles (ALB).  Photo provided by:  Dennis Haugen, USDA Forest Service, Bugwood.org

 

 

 

 

 

Damage caused by ALB.  Photo provided by:  Dennis Haugen, USDA Forest Service, Bugwood.org

 

 

 

 

 

 

Emergence hole caused by an emerging ALB adult.  Photo provided by:  Dennis Haugen, USDA Forest Service, Bugwood.org

 

 

 

 

 

Adult Asian longhorn beetle (ALB).  Photo provided by:  Dean Morewood, Health Canada, Bugwood.org

Insect Hotline Issue 15

The pupal skin sticking out of the side ofthe tree is often one of the first signs lilac ash borer has infested a tree or shrub.  Photo provided by:  Whitney Cranshaw, Colorado State University, Bugwood.org

 

 

Mating pair of lilac/ash borers (Sessidae; a type of moth).  Photo provided by:  Whitney Cranshaw, Colorado State University, Bugwood.org

 

 

Larvae (pictured) borer through the wood as they feed.  Photo provided by:  David Cappaert, Michigan State University, Bugwood.org

What’s Hot HL Issue 14?

 

Flatids often produce waxy substance as feeding on plants.  Nymphs are settled on stem amongst the waxy substance.

 

 

 

Side view of some nymphs feeding.

 

 

 

 

Close-up of a nymph settled on the twig.

 

 

 

 

 

Nymphs without the waxy around them.  This and previous pictures of the flatids were provided by:  Brian A. Kunkel, University of Delaware, Ornamentals IPM Extension Specialist

 

Adult flatid.  Photo provided by:  David Cappaert, Michigan State University, Bugwood.org

Disease Hotline Issue 13

Cytospora canker on an apple.  Photo provided by:  William Jacobi, Colorado State University, Bugwood.org

 

 

Cytospora canker on a willow twig.  Photo provided by:  William Jacobi, Colorado State University, Bugwood.org

 

 

Tobacco Rattle Virus on Hosta leaf.  Photo provided by:  Alan Windham, University of Tennessee, Bugwood.org

 

 

Tobacco Rattle Virus on Peony.  Photo provided by:  R.K. Jones, North Carolina State University, Bugwood.org

 

 

Tobacco Rattle Virus on Hosta.  Photo provided by:  Alan Windham, University of Tennessee, Bugwood.org

 

 

 

Tobacco rattle virus on epemedium.  Photo provided by:  Bob Mulrooney, University of Delaware, Plant Pathology Extension Specialist

What’s Hot HL Issue 13?

Horsechestnut leaf blotch.  Photo from:  Bob Mulrooney, University of Delaware.

 

 

 

 

 

 

Photos for brown patch, roseslug sawflies (search roseslug sawfly), bagworms and fall webworms (Insect Hotline Issue 20, 2008 has best images) have already been posted.  Please use search function to locate images.

What’s Hot HL Issue 12?

 

 

 

 

 

Japanese beetle adult.  Photo provided by:  Brian A. Kunkel, University of Delaware, Ornamentals IPM Extension Specialist

 

 

 

 

 

Imprelis injury.  Photo found at:  http://extension.psu.edu/greenindustry/giec/news/2011/some-observations-on-imprelis-injury-to-trees