HL Issue 16 2008

HL Issue 15 2008

HL Issue 14 2008

Disease Hotline Issue 16

Botryosphaeria Canker damage viewed from far away on a redbud. Photo provided by Nancy Gregory, UD Plant Diagnostician.

Botryosphaeria Canker on the trunk of the redbud. Photo provided by Nancy Gregory, UD Plant Diagnostician.

Insect Hotline Issue 16

Banded wing whitefly. Photo courtesy of Dr. Dave Shetlar, The Ohio State University.

Greenhouse whitefly, pupae and adults. Notice the spines coming off the pupae and adults hold wings flatter and wider on body. Photo from UC Statewide IPM project.

Silverleaf whitefly, pupae and adults. Notice lack of spines on pupae and adults hold wings closer to the body. Photo from UC Statewide IPM project.

Mulberry whitefly. Photo by: Whitney Cranshaw, Colorado State University, Bugwood.org.

Azalea whitefly. Photo by Brian Kunkel, Ornamental IPM Specialist, University of Delaware.

What's Hot HL Issue 16

Fall webworm tents. Photo by Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Disease Hotline Issue 15

Distant view of brown patch.

Close-up of brown patch. Photos by: Bob Mulrooney, Plant Pathologist, University of Delaware.

What's Hot HL Issue 15

Damage caused by juniper scale. Photo by: Joseph LaForest, University of Georgia, Bugwood.org.

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

Pine needle scale adults. Photo by: Brytten Steed, US Forest Service, Bugwood.org.


Spring tails (Collembola) found in moist areas, duff under trees or shrubs, and thatch layer of lawns. Photo by: Susan Ellis, Bugwood.org.

A different species of spring tail. Photo by: Ernest C. Bernard, The University of Tennessee, Bugwood.org.


Hairy chinch bug damage to a lawn. Photo courtesy of Dr. Dave Shetlar, The Ohio State University.

Short wing and long wing forms of adult hairy chinch bugs. Photo courtesy of Dr. Dave Shetlar, The Ohio State University.

Insect Hotline Issue 15

Two spotted spider mites on webbing. Photo by: David Cappaert, Michigan State University, Bugwood.org.

Two spotted spider mite nymph. Photo courtesy of Dr. Dave Shetlar, The Ohio State University.

Two spotted spider mite eggs, male guarding an immature female molting to an adult. Photo courtesy of Dr. Dave Shetlar, The Ohio State University.

What's Hot HL Issue 14

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

Two spotted spider mites on webbing. Photo by: David Cappaert, Michigan State University, Bugwood.org.

Two spotted spider mite adults. Photo by: Frank Peairs, Colorado State University, Bugwood.org.


Japanese maple scale on dogwood. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Weed Hotline Issue 14

Lambsquarters treated with Roundup.

Crabgrass.

Crabgrass treated with Roundup.

Mugwort.

Mugwort treated with Roundup.

Nutsedge. Photos taken by: Gordon Johnson, Extension Agent – Agriculture & Commercial Horticulture, Kent County, University of Delaware.

Insect Hotline Issue 14

Defoliated leaves from dogwood sawfly feeding. Photo by: Brian Kunkel, University of Delaware


Dogwood sawfly larvae. Photos by: Brian Kunkel, University of Delaware

Older instar of dogwood sawfly. Photo by: Jerry A. Payne, USDA Agricultural Research Service, Bugwood.org.