Disease Hotline Issue 16

Rust found on Hypericum.  Photo provided by:  Bob Mulrooney, University of Delaware

 

 

 

 

Rust on upper leaf surface of hypericum.  Photo provided by:  Bob Mulrooney, University of Delaware

 

 

 

Pictures for fire blight have already been posted to the website.  Please search for these images with the search function.

 

Disease Hotline Issue 14


Buddleia leaf infested with foliar nematode. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Peony leaf blotch. Photo provided by:

Jody Fetzer, New York Botanical Garden, Bugwood.org


Alfalfa mosaic virus. Photo provided by:

Howard F. Schwartz, Colorado State University, Bugwood.org


Fire blight. Photo provided by: William Jacobi, Colorado State University, Bugwood.org

What’s Hot HL Issue 6


Infestation of larch casebearers. Photo by: Milan Zubrik, Forest Research Institute – Slovakia, Bugwood.org.

Close-up of larch casebearer larva. Photo by: Ian Kimber, Bugwood.org.

Larch casebearer adult. Photo by: Ian Kimber, Bugwood.org.

Fire blight. Photo by: Rebekah D. Wallace, University of Georgia, Bugwood.org.

Evidence of fire blight on trunk of a crabapple. Photo by: William Jacobi, Colorado State University, Bugwood.org.

Western flower thrips adult. Photo by: Jack T. Reed, Mississippi State University, Bugwood.org.

What’s Hot HL Issue 13


Fireblight on crabapple. Photo by: William Jacobi, Colorado State University, Bugwood.org.

American dog tick on a blade of grass. Photo by: Jim Occi, BugPics, Bugwood.org.


American dog ticks. Photo by: Mat Pound, USDA Agricultural Research Service, Bugwood.org.


Comparison of deer ticks (left) and dog ticks (right) alongside a ruler. Photo by: Jim Occi, BugPics, Bugwood.org.

Female deer tick (black-legged tick) and a dime.


All stages of the deer (black-legged tick). Photos of only deer ticks found at http://www.ent.iastate.edu/imagegallery/ticks/deertick.html.


Septoria leafspot on rudbeckiae. Photo by Nancy Gregory, Plant Diagnostician, University of Delaware.


Septoria leafspot. Photo by Bob Mulrooney, Plant Pathologist, University of Delaware.