What's Hot HL Issue 9

Cottony maple leaf scale. Photo taken by: Nancy Gregory, Plant Diagnostician, University of Delaware

Azalea lace bug. Photo taken by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

What's Hot HL Issue 8

Dutch elm disease. Photo provided by: William Jacobi, Colorado State University, Bugwood.org

Damage caused by hawthorn leaf miner. Photo provided by: Whitney Cranshaw, Colorado State University, Bugwood.org

What's Hot HL Issue 7

Cottony maple leaf scale. The white cottony 'sacs' are filled with scale eggs. Photo found at: http://www.ces.ncsu.edu/depts/ent/notes/O&T/specificplants/note136/note136.html

What's Hot HL Issue 6

Hemlock woolly adelgid egg masses. Photo provided by: Brian Kunkel, Ornamentals IPM Extension Specialist, University of Delaware

Roseslug sawfly damage to a rose leaf. Photo provided by: Brian Kunkel, Ornamentals IPM Extension Specialist, University of Delaware

Roseslug sawfly larva feeding on rose leaf. Photo provided by: Brian Kunkel, Ornamentals IPM Extension Specialist, University of Delaware

Cedar apple rust. Photo provided by: Daniel H. Brown, USDA Forest Service, Bugwood.org

Cedar apple rust. Photo provided by: USDA Forest Service - Region 8 Archive, USDA Forest Service, Bugwood.org

What's Hot HL Issue 9

Euonymus scale adults (gray = female, white = male). Photo provided by: Lisa Ames, University of Georgia, Bugwood.org

Pine bark adelgids. Photo provided by: Steven Katovich, USDA Forest Service, Bugwood.org

Xylosandrus germanus adult (ambrosia beetle). Photo provided by: Pennsylvania Department of Conservation and Natural Resources - Forestry Archive, , Bugwood.org

Xyleborinus saxeseni adult (Asian ambrosia beetle). Photo provided by: Pennsylvania Department of Conservation and Natural Resources - Forestry Archive, , Bugwood.org

Granulate ambrosia beetle feeding damage. Photo provided by: Laura Lazarus, North Carolina Division of Forest Resources, Bugwood.org

What's Hot Hotline Issue 8

Woolly beech aphids. Photo provided by: Haruta Ovidiu, University of Oradea, Bugwood.org

Adult cottony camellia scale. Photo provided by: United States National Collection of Scale Insects Photographs Archive, USDA Agricultural Research Service, Bugwood.org

Cottony camellia scale infestation. Photo provided by: John A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org.

What's Hot HL Issue 7

Sycamore anthracnose. Photo by: Bob Mulrooney, Plant Pathologist Specialist, University of Delaware.

What's Hot HL Issue 9

Crabgrass. Photo by: Gordon Johnson, Extension Agent, Agriculture and Commercial Horticulture, University of Delaware, Kent County.

Dunce cap stage of bagworms. Bag is held upright by early instar bagworms and is called the 'dunce cap' stage. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.



Calico scales. Photo by: Raymond Gill, California Department of Food and Agriculture, Bugwood.org.

What's Hot HL Issue 8

Woolly beech aphid infestation. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Woolly beech aphids. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Imported willow leaf beetle larvae. Photo by: Paul Weston, Cornell University, Bugwood.org.

Imported willow leaf beetle adults. Photo by: David Cappaert, Michigan State University, Bugwood.org.

What's Hot HL Issue 6

Rizosphaera needlecast on Norway spruce.


Rizosphaera needlecast on Norway spruce, closeup. Rizosphaera photos by: Nancy Gregory, University of Delaware.


Woolly beech aphid. Photo by: Whitney Cranshaw, Colorado State University, Bugwood.org.

Heavy pine bark adelgid infestation. Photo by: USDA Forest Service - Northeastern Area Archive, USDA Forest Service, Bugwood.org.


Light infestation of pine bark adelgids. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Boxwood leafminer adult and blistered leaf. Photo by: John A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org.

Boxwood leafminer larvae. Photo by: Nancy Gregory, Plant Diagnostician, University of Delaware.

What's Hot HL Issue 5

Woolly apple aphid damage. Photo by: Whitney Cranshaw, Colorado State University, Bugwood.org.


Wooly apple aphid infestation. Photo by: Joseph Berger, Bugwood.org.

Woolly apple aphids. Photo by: Whitney Cranshaw, Colorado State University, Bugwood.org.


Larch casebearer damage. Photo by: erald E. Dewey, USDA Forest Service, Bugwood.org.

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

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



Hemlock woolly adelgid. Photo by: James Johnson, Georgia Forestry Commission, Bugwood.org.


Fusiform rust on loblolly pine. Photo by Nancy Gregory, Plant Diagnostician, University of Delaware.