Showing posts with label July. Show all posts
Showing posts with label July. Show all posts
Saturday, July 31, 2010
Friday, July 30, 2010
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.
Friday, July 16, 2010
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
Friday, July 9, 2010
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.
Friday, July 2, 2010
Insect Hotline Issue 14
Fletcher scale on bald cypress.
Close-up of lecanium scale on cypress.
Close-up of lecanium eggs.
Lecanium scale on oaks. All photos provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware
Friday, July 31, 2009
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