Disease Hotline Issue 21

Leaves on tulip tree turning yellow from drought conditions. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Pyracantha scab. Photo provided by: Ethel Dutky, University of Maryland, Bugwood.org

What's Hot HL Issue 21

Powdery mildew. Photo by: Brian Kunkel, Ornamentals IPM Extension Specialist, University of Delaware

Japanese Maple scale on holly. Photo by: Brian Kunkel, Ornamentals IPM Extension Specialist, University of Delaware

Tuliptree/magnolia scales on magnolia. Photo by: Brian Kunkel, Ornamentals IPM Extension Specialist, University of Delaware

Insect Hotline Issue 21

White grubs. This image compares the size of three white grub species. Left to right: Japanese beetle, European Chafer, Junebug (Phyllophaga). Photo by: David Cappaert, Michigan State University, Bugwood.org

Disease Hotline Issue 20

Foliar nematode on Buddleia. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

What's Hot HL Issue 20

Harlequin bug adult. Photo provided by: Whitney Cranshaw, Colorado State University, Bugwood.org

Harlequin bug eggs. Photos provided by: Whitney Cranshaw, Colorado State University, Bugwood.org

Harlequin bug nymph. Photo provided by: Whitney Cranshaw, Colorado State University, Bugwood.org

Harlequin bug nymph. Photo provided by: Edward L. Manigault, Clemson University Donated Collection, Bugwood.org

Insect Hotline Issue 20

Tobacco budworms. Photo provided by: R.J. Reynolds Tobacco Company Slide Set, R.J. Reynolds Tobacco Company, Bugwood.org

Tobacco budworm adult. Photo provided by: Blake Layton, Mississippi State University, Bugwood.org

Red-tailed wasp, a parasitoid of tobacco budworm. Photo provided by: R.J. Reynolds Tobacco Company Slide Set, R.J. Reynolds Tobacco Company, Bugwood.org

What's Hot HL Issue 19

Saddleback caterpillars. These have stinging hairs. Photo provided by: Robert L. Anderson, USDA Forest Service, Bugwood.org

Banded tussock moth - caterpillar stage (immature). These hairs do not sting. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

White-marked tussock moth --caterpillar stage (immature). These hairs do not sting. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Disease Hotline Issue 19

Fusarium wilt/blight/rot/damping off. Photo provided by: Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org

Insect Hotline Issue 19

Yellow spotting or banding caused by Cryptomeria scale.

Ants attracted to the honeydew produced by Tuliptree scale (soft scale).

Magnolia scales on Star magnolia (notice the scale in the upper right corner has been chewed open by a beneficial insect--probably a lady beetle).

Holly infested with white prunicola scale. All photos provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Insect Hotline Issue 18

Fungus gnats (maggots). Photo provided by: David Cappaert, Michigan State University, Bugwood.org

Japanese beetle white grub. Photo provided by: Mike Reding & Betsy Anderson, USDA Agricultural Research Service, Bugwood.org

Count the five prolegs (fleshy appendages) on the black swallowtail caterpillar. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Notice the eight prolegs (fleshy appendages) on the redheaded pine sawfly. Photo by: G. Keith Douce, University of Georgia, Bugwood.org.

What's Hot HL Issue 18

Off color green and white specks on bald cypress indicate bald cypress rust mites. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Close-up of a rust mite on Canada thistle. Photo provided by: Eric Erbe, USDA Agricultural Research Service, Bugwood.org

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

Another view of locust leafminer damage. Photo provided by: Chris Evans, River to River CWMA, Bugwood.org

Locust leafminer life stages (egg, larva, pupa, adult [left to right]). Photo provided by: Bruce W. Kauffman, Tennessee Department of Agriculture, Bugwood.org

Peony leaf blotch. Photo found at: http://www.plantpath.iastate.edu/pdc/node/137

Disease Hotline Issue 18

Day lily leaf streak. Photo from a pdf found at: http://www.doacs.state.fl.us/pi/enpp/pathology/pathcirc/pp376.pdf by R.M. Leahy & T.S. Schubert

Sclerotinia root rot on sunflower. Photo provided by: Howard F. Schwartz, Colorado State University, Bugwood.org

"Sclerotia" of Sclerotina stem rot inside infected stem. Photo provided by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org

Powdery mildew on crape myrtle. Photo provided by: Robert Lambe, Virginia Polytechnic Institute and State University, Bugwood.org

HL Issue 15 2010

HL Issue 14 2010

What's Hot HL Issue 17

Bacterial leaf scorch. Photo provided by: Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org

Yellow oxalis. Photo provided by: Ted Bodner, Southern Weed Science Society, Bugwood.org

Juniper scale adults. Photo by: United States National Collection of Scale Insects Photographs Archive, USDA Agricultural Research Service, Bugwood.org.

Dogwood sawflies feeding. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Insect Hotline Issue 17

Fall webworms at terminal ends of branches.

Another tree with fall webworms webbing over terminal branches. Photos provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Weeds Hotline Issue 17

Crabgrass seedlings. Photo provided by: Joseph M. DiTomaso, University of California - Davis, Bugwood.org

Crabgrass seed head and flower. Photo provided by: Steve Dewey, Utah State University, Bugwood.org

Disease Hotline Issue17

Brown patch in turf.

Tannish lesions on leaf blades are a symptom of brown patch.

Mycelium growing between leaves of grass. All photos were found at: http://www.cals.ncsu.edu/plantpath/extension/fact_sheets/Turfgrass_-_Managing_Brown_Patch_in_Tall_Fescue_Landscapes.htm as part of a fact sheet on brown patch in tall fescue.