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 4

Black vine weevil adults. Photo provided by: Kent Loeffler, Cornell University, Bugwood.org

Fire blight. Photo provided by: R. Grimm, Bugwood.org

Monilinia blight. Photo found at: http://www.apsnet.org/pd/covers/2005/dno05fr.htm

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.

What's Hot HL Issue 11

Callery pear with heavy fire blight symptoms. Photo by: Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org.

Sign of fire blight in callery pear. Photo by: Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org.

Tubakia leaf spot on oak. Photo by: Nancy Gregory, Plant Diagnostician, University of Delaware.

What's Hot HL Issue 10

Black spot on roses. Photo by: Brian Kunkel, Ornamentals IPM specialist, University of Delaware.

Powdery Mildew on common lilac. Photo by: Whitney Cranshaw, Colorado State University, Bugwood.org.

Fire blight on pear. Photo by: Nancy Gregory, Plant Diagnostician, University of Delaware.

Elm pouch gall (caused by aphids).

Elm pouch gall (caused by aphids). Photos of elm pouch galls by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.


Rose slug sawfly feeding damage. Photo by: Tracy Wooten, Sussex County Extension Agent - Horticulture, University of Delaware.

Rose slug sawfly. Photo by: John A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org.