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

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

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.