Cedar-apple rust on crabapple.
Cedar-apple rust on crabapple.
Cedar-apple rust on eastern red cedar.
Cedar-quince rust on juniper.
Cedar-quince rust on Chinese hawthorn.
Cedar-quince rust.
Iris leaf spot. Photos by: Bob Mulrooney, Plant Pathologist, University of Delaware.
Tag Archives: 2008
Insect Hotline Issue 12
Below are some clearwing borers (Sesiidae) in our area:
Dogwood borer damage. Photo by: ohn A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org.
Dogwood borer adults, female (top) and male (bottom). Photos by: James Solomon, USDA Forest Service, Bugwood.org.
Peachtree borer damage at soil line. Photo by: Eugene E. Nelson, , Bugwood.org.
Peachtree borer larvae feeding damage. Photo by: Eugene E. Nelson, , Bugwood.org.
Peachtree borer larva. Photo by: Clemson University – USDA Cooperative Extension Slide Series, , Bugwood.org.
Peach tree borer adults, female (top) and male (bottom). Photos by: Clemson University – USDA Cooperative Extension Slide Series (top), & Wendell Snow, USDA Agricultural Research Service (bottom), Bugwood.org.
Below are some flatheaded borers (Buprestidae) in our area:
Twolined chestnut borer adult. Photo by: Robert A. Haack, USDA Forest Service, Bugwood.org.
Twolined chestnut borer larva. Photo by: Robert A. Haack, USDA Forest Service, Bugwood.org.
Bronze birch borer damage. Photo by: Photo by USDA Forest Service – Northeastern Area Archive, Bugwood.org.
Sawdust frass-packed tunnels/galleries of bronze birch borer. Photo by: William M. Ciesla, Forest Health Management International, Bugwood.org.
Bronze birch borer adult. Photo by: Photo by Pennsylvania Department of Conservation and Natural Resources – Forestry Archive, Bugwood.org.
Below are some of the roundheaded borers (Cerambycidae) in our area
Locust borer adult. Photo by: David Cappaert, Michigan State University, Bugwood.org.
Locust borer galleries. Photo by: James Solomon, USDA Forest Service, Bugwood.org.
Roundheaded apple tree borer adult. Photo by: Pennsylvania Department of Conservation and Natural Resources – Forestry Archive, Bugwood.org.
Roundheaded borer larva (image is of Southern pine sawyer). Photo by: Clemson University – USDA Cooperative Extension Slide Series, Bugwood.org.
Redheaded ash borer adult and emergence hole. Photo by: Howard Ensign Evans, Colorado State University, Bugwood.org.
Redheaded ash borer galleries. Photo by: Gyorgy Csoka, Hungary Forest Research Institute, Bugwood.org.
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.
Insect Hotline Issue 11
Hemlocks in decline or dying from Hemlock woolly adelgid infestations. Photo by: William M. Ciesla, Forest Health Management International, Bugwood.org.
Hemlock infested with Hemlock Woolly Adelgid. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Close-up of cottony adults. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Close-up of HWA crawler and adult. Photo by: Pennsylvania Department of Conservation and Natural Resources – Forestry Archive, , Bugwood.org.
Disease Hotline Issue 10
Dutch Elm disease. Photo by: William M. Brown Jr., Bugwood.org
Vascular staining by fungus. Photo by: Paul H. Peacher, USDA Forest Service, Bugwood.org.
Powdery mildew on roses. Photo by Bob Mulrooney, Plant Pathologist, University of Delaware.
Powdery Mildew on common lilac. Photo by: Whitney Cranshaw, Colorado State University, Bugwood.org.
Frog-eye leaf spot on red maple. Photo by Bob Mulrooney, Plant Pathologist, University of Delaware.