Weed Hotline Issue 21


Japanese honeysuckle. Photo by: Charles T. Bryson, USDA Agricultural Research Service, Bugwood.org

Close-up of Japanese honeysuckle. Photo by: Dan Clark, USDI National Park Service, Bugwood.org

Japanese honeysuckle fruits and foliage. Photo by: Ted Bodner, Southern Weed Science Society, Bugwood.org

Trumpet creeper flowers. Photo by: Theodore Webster, USDA Agricultural Research Service, Bugwood.org

View of trumpet creeper foliage. Photo by: Dan Clark, USDI National Park Service, Bugwood.org

Trumpet creeper seeds. Photo by: Ken Chamberlain, The Ohio State University, Bugwood.org

Virginia creeper. Photo by: Theodore Webster, USDA Agricultural Research Service, Bugwood.org

Close-up of Virginia Creeper. Photo by: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org

Virginia creeper. Photo by: Ted Bodner, Southern Weed Science Society, Bugwood.org

Poison Ivy seedling. Photo by: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org

Flowering poison ivy. Photo by: Joseph LaForest, University of Georgia, Bugwood.org

Poison ivy. Photo by: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org

Poison ivy stem. Photo by: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org

Wild grape (muscardine). Photo by: Ted Bodner, Southern Weed Science Society, Bugwood.org

Close-up of wild grape (muscardine). Photo by: Ted Bodner, Southern Weed Science Society, Bugwood.org

Insect Hotline Issue 21


Bees and wasps often visit magnolia or tuliptree scales during late summer early fall to feed on the honeydew. The presence of lots of bees and wasps around magnolia or tuliptrees may indicate an infestation close-by.

The ragged hole in one of the scales on the left has been tore open and killed by a beneficial insect, probably a lady beetle.

Cluster of magnolia scale.

Sooty mold growing on honeydew that had landed on trunk and branches.

A drop of honeydew dropping from a swollen female magnolia scale. All photos were taken by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Weed Hotline Issue 20


American speedwell. Photo by: Mary Ellen (Mel) Harte, , Bugwood.org

Henbit deadnettle. Photo by: Steve Dewey, Utah State University, Bugwood.org

Hairy bittercress. Photo by: Dan Tenaglia, Missouriplants.com, Bugwood.org

Henbit deadnettle seedling. Photo by: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org

Downy brome (Cheatgrass). Photo by: Leslie J. Mehrhoff, University of Connecticut, Bugwood.org

European field pansy (field violet). Photo by: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org

Purple deadnettle. Photo by: Richard Old, XID Services, Inc., Bugwood.org

Canadian horseweed. Photo by: Richard Old, XID Services, Inc., Bugwood.org

Field violet (European field pansy). Photo by: Richard Old, XID Services, Inc., Bugwood.org

Common Chickweed. Photo by: Richard Old, XID Services, Inc., Bugwood.org

Annual rygrass. Image found at http://www.agry.purdue.edu/turf/tips/2005/cale49.htm and was by Cale Bidgelow.

Disease Hotline Issue 20


Foliar nematode infesting hosta. Photo by: Bob Mulrooney, Plant Pathologist, University of Delaware

Foliar nematode infesting peony. Photo by: Bob Mulrooney, Plant Pathologist, University of Delaware

Plumbago foliar nematode. Photo by: Bob Mulrooney, Plant Pathologist, University of Delaware

Foliar nematodes infecting hosta. Photo found at:http://www.extension.umn.edu/yardandgarden/YGLNews/YGLNewsSept12007.html and taken by: Michelle Grabowski.

Sclerotium rolfsii (southern blight). Photo taken by: Nancy Gregory, University of Delaware Plant Diagnostician.