Friday, July 31, 2009
What's Hot HL Issue 18
Euonymus scale crawlers. Photo provided by: Daniel Herms, The Ohio State University, Bugwood.org
Disease Hotline Issue 18
Brown patch on tall fescue. Photo provided by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org
Close-up of brown patch on tall fescue. Photo provided by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org
Brown patch in centipedegrass. Photo provided by: Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org
Foliar nematode infecting hosta. Photo provided by: Department of Plant Pathology Archive, North Carolina State University, Bugwood.org
Close-up of foliar nematode infected leaf (left) on hosta. Photo provided by: Department of Plant Pathology Archive, North Carolina State University, Bugwood.org
Weeds Hotline Issue 18
Mugwort plants. Photo provided by: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org
Leaf variation of mugwort plants. Photo provided by: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org
Mugwort flowers. Photo provided by: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org
Mugwort roots. Photo provided by: Ohio State Weed Lab Archive, The Ohio State University, Bugwood.org
Insect Hotline Issue 18
Fall webworm. Photo provided by: B.A. Kunkel, Ornamentals IPM Extension Specialist, University of Delaware
Immature dogwood sawflies. Photo provided by: B. A. Kunkel, Ornamentals IPM Extension Specialist, University of Delaware
Friday, July 24, 2009
What's Hot HL Issue 17
Fall webworms and webbing on terminal branches. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Cicada killer adult. Photo provided by: Jessica Lawrence, NC State Entomology Department, Bugwood.org.
Cicadas captured and paralyzed by female cicada killer to provision her chambers. Photo by: Kenneth R. Law, USDA APHIS PPQ, Bugwood.org.
Clavate tortoise beetle. Photo by: David Cappaert, Michigan State University, Bugwood.org.
Thistle tortoise beetle. Photo by: David Cappaert, Michigan State University, Bugwood.org.
Thistle tortoise beetle larva. Photo by: David Cappaert, Michigan State University, Bugwood.org.
Rose midge larvae (white spots) on rose. Photo provided by: http://oregonstate.edu/dept/nurspest/rose_midge.htm.
Powdery mildew on flowering dogwood. Photo by: Mary Ann Hansen, Virginia Polytechnic Institute and State University, Bugwood.org.
Cultural Hotline Issue 17
Severely drought stressed willow. Photo provided by: Randy Cyr, Greentree, Bugwood.org.
Insect Hotline Issue 17
European fruit lecanium on blueberry. Photo provided by: Jerry A. Payne, USDA Agricultural Research Service, Bugwood.org.
Fletcher scale. Photo provided by: Whitney Cranshaw, Colorado State University, Bugwood.org.
Lecanium scales on Celtis laevigata. Photo provided by: James Solomon, USDA Forest Service, Bugwood.org.
Disease Hotline Issue 17
Cedar-quince rust on 'Bradford' Callery pear fruit. Photo by Bob Mulrooney, Plant Pathologist, University of Delaware
Friday, July 17, 2009
What's Hot HL Issue 16
Aphids. Photo by: Whitney Cranshaw, Colorado State University, Bugwood.org.
Euonymus scale infestation. Males are elongate and white. Females are gray to brown. Photo provided by: Lisa Ames, University of Georgia, Bugwood.org.
Japanese beetle adult feeding. Photo by: David Cappaert, Michigan State University, Bugwood.org.
Close-up of a Japanese beetle head. Photo by: Susan Ellis, USDA APHIS PPQ, Bugwood.org.
Azalea whitefly on azalea. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Insect Hotline Issue 16
Distant view of bald cypress rust mite damge.
Bald cypress rust mite damage on branch (close-up).
Bald cypress rust mites.
All photos provided by Dr. Casey Sclar, Plant Health Care Division Leader, Longwood Gardens.
Disease Hotline Issue 16
Powdery mildew on Norway Maple. Photo by: Andrej Kunca, National Forest Centre - Slovakia, Bugwood.org.
Powdery Mildew on Norway maple. Photo by: Petr Kapitola, State Phytosanitary Administration, Bugwood.org.
Phyllosticta leaf spot on Leucothoe. Photo by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org.
Phyllosticta leaf spot on Leucothoe. Image shown is a A single leaf spot with small, black spore-producing bodies ("pycnidia") with white ooze containing spores. Photo provided by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org. |
Asexual spores of Phyllosticta fungus. Photo by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org.
Phyllosticta leaf spot on crape myrtle. Photo by: Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org.
Phyllosticta leaf spot on highbush blueberry. Photo by: Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org.
Cultural Hotline Issue 16
Tree with number of suckers. Photo found at: http://www.coopext.colostate.edu/4DMG/Trees/stump.htm.
Peach tree with sucker at base. Photo provided by: Rob Flynn, Bugwood.org.
Ash tree with a sucker. Emerald ash borers will cause ash trees to produce suckers. Photo by: Pennsylvania Department of Conservation and Natural Resources - Forestry Archive, , Bugwood.org.
Ash tree with many suckers. Notice this tree has been attacked by emerald ash borer. In the photo the brown area on the tree is where bark was pulled away to reveal the serpentine tunneling of the emerald ash borer larvae. Photo by: Michigan Department of Agriculture, Bugwood.org.