HL Issue 15 2010

HL Issue 14 2010

What's Hot HL Issue 17

Bacterial leaf scorch. Photo provided by: Edward L. Barnard, Florida Department of Agriculture and Consumer Services, Bugwood.org

Yellow oxalis. Photo provided by: Ted Bodner, Southern Weed Science Society, Bugwood.org

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

Dogwood sawflies feeding. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Insect Hotline Issue 17

Fall webworms at terminal ends of branches.

Another tree with fall webworms webbing over terminal branches. Photos provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Weeds Hotline Issue 17

Crabgrass seedlings. Photo provided by: Joseph M. DiTomaso, University of California - Davis, Bugwood.org

Crabgrass seed head and flower. Photo provided by: Steve Dewey, Utah State University, Bugwood.org

Disease Hotline Issue17

Brown patch in turf.

Tannish lesions on leaf blades are a symptom of brown patch.

Mycelium growing between leaves of grass. All photos were found at: http://www.cals.ncsu.edu/plantpath/extension/fact_sheets/Turfgrass_-_Managing_Brown_Patch_in_Tall_Fescue_Landscapes.htm as part of a fact sheet on brown patch in tall fescue.

What's Hot HL Issue 16

Tree showing signs of Emerald Ash Borer damage. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delware

Emerald ash borer adult and serpentine tunnels packed with frass. Photo provided by: Eric R. Day, Virginia Polytechnic Institute and State University, Bugwood.org

Tree damaged by Asian Longhorn beetle. Photo provided by: Pennsylvania Department of Conservation & Natural Resources - Forestry Archive, Bugwood.org

Emergence hole of Asian Longhorn beetle. Photo provided by: Kenneth R. Law, USDA APHIS PPQ, Bugwood.org

Asian Longhorn beetle. Photo provided by: Photo provided by: Pennsylvania Department of Conservation & Natural Resources - Forestry Archive, Bugwood.org

Another picture of rose midge damage (bull-necking) and the white spots are midge larvae. Photos found at: http://oregonstate.edu/dept/nurspest/rose_midge.htm website and appears to have been taken by Robin Rosetta.

Disease Hotline Issue 16

Drought stressed turf. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Pithium damage. Photo found at: http://www.extension.purdue.edu/extmedia/BP/BP-109-W.pdf (Richard Latin Prof. of Pathology)

Close-up of Pythium on turf. Photo found at: http://www.extension.purdue.edu/extmedia/BP/BP-109-W.pdf (Richard Latin Prof. of Pathology)

Brown patch infesting turf. Photo found at: http://www.cals.ncsu.edu/plantpath/extension/fact_sheets/Turfgrass_-_Managing_Brown_Patch_in_Tall_Fescue_Landscapes.htm

Maple showing signs of drought stress. Photo provided by: Robert L. Anderson, USDA Forest Service, Bugwood.org

Pine showing drought stress. Photo provided by: Robert L. Anderson, USDA Forest Service, Bugwood.org

Insect Hotline Issue 16

Spring cankerworm on a leaf. Photo provided by: James B. Hanson, USDA Forest Service, Bugwood.org

Spring cankerworm adult. Photo provided by: Jerald E. Dewey, USDA Forest Service, Bugwood.org

Fall cankerworm damage. Photo provided by: USDA Forest Service - Ogden Archive, USDA Forest Service, Bugwood.org

Fall cankerworm feeding on a leaf. Photo provided by: Tim Tigner, Virginia Department of Forestry, Bugwood.org

Fall cankerworm larva. Photo provided by: John H. Ghent, USDA Forest Service, Bugwood.org

Fall cankerworm female laying eggs. Photo provided by: John H. Ghent, USDA Forest Service, Bugwood.org

Elm spanworm damage. Photo provided by: USDA Forest Service - Region 8 Archive, USDA Forest Service, Bugwood.org

Elm spanworm camouflaged to look like a stick. Photo provided by: North Carolina Forest Service Archive, Bugwood.org

Elm spanworm on a leaf. Photo provided by: Arnold T. Drooz, USDA Forest Service, Bugwood.org

What's Hot HL Issue 15

Spruce spider mite damage. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Close-up of spider mite damage. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

A cicada killer. Photo provided by: Edward L. Manigault, Clemson University Donated Collection, Bugwood.org

Lilac/ash borer adult. Photo provided by: Daniel Herms, The Ohio State University, Bugwood.org

Pupal case of a lilac/ash borer. Photo provided by: Whitney Cranshaw, Colorado State University, Bugwood.org

Disease Hotline Issue 15

Septoria leaf spot. Photo provided by: Photo provided by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org

Septoria leaf spot. Photo provided by: Photo provided by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org

Insect Hotline Issue 15

Mimosa webworm in a honeylocust tree.

Close-up of mimosa webworm webbing leaves together.

Mimosa webworm crawling from underneath a leaflet. All photos provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.

Disease Hotline Issue 14

Buddleia leaf infested with foliar nematode. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware

Peony leaf blotch. Photo provided by:

Jody Fetzer, New York Botanical Garden, Bugwood.org

Alfalfa mosaic virus. Photo provided by:

Howard F. Schwartz, Colorado State University, Bugwood.org

Fire blight. Photo provided by: William Jacobi, Colorado State University, Bugwood.org