Wednesday, June 30, 2010
Friday, June 25, 2010
What's Hot HL Issue 13
Fall webworm damage & webbing. Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delware
Hollyhock rust on upper surface of the leaf. Photo found at http://plantclinic.cornell.edu/FactSheets/hollyhockrust/hollyhockrust.htm & provided by: Dawn Dailey O'Brien, Cornell University
Hollyhock rust on underside of the leaf. Photo found at http://plantclinic.cornell.edu/FactSheets/hollyhockrust/hollyhockrust.htm & provided by: Dawn Dailey O'Brien, Cornell University
Disease Hotlne Issue 13
Phyllosticta on Leucothoe. Photo by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org.
Phyllosticta leaf spot on maple. Photo provided by: Joseph O'Brien, USDA Forest Service, Bugwood.org
Insect Hotline Issue 13
Two spotted spider mites with eggs (up close). Photo provided by: Tracy Wootten, Horticulture Extension Agent, Sussex County, University of Delaware
Two spotted spider mites and eggs. Photo provided by: Tracy Wootten, Horticulture Extension Agent, Sussex County, University of Delaware
Friday, June 18, 2010
What's Hot HL Issue 12
Pyracantha scab on fruits. Photo by: Bob Mulrooney, Plant Pathologist, University of Delaware
Cottony maple leaf scale. Photo by: Nancy Gregory, Plant Diagnostician, University of Delaware
Daylily leaf streak. Photo found at: http://www.umass.edu/umext/floriculture/fact_sheets/pest_management/daylily_rust_streak.htm
Disease Hotline Issue 12
Horsechestnut leaf blotch. Photo taken by: M. Petitjean, University of Massachusetts Extension & found at: http://www.umassgreeninfo.org/fact_sheets/diseases/guignardia_leaf_blotch.pdf
Cercospora leafspot on rose. Photo provided by: Paul Bachi, University of Kentucky Research & Education Center, Bugwood.org
Cedar apple rust. Photo provided by: USDA Forest Service - Region 8 Archive, USDA Forest Service, Bugwood.org
Cedar apple rust. Photo provided by: Daniel H. Brown, USDA Forest Service, Bugwood.org
Insect Hotline Issue 12
Japanese beetle adults. Photo provided by: Brian Kunkel, Ornamenals IPM Specialist, University of Delaware
Friday, June 11, 2010
What's Hot HL Issue 11
Japanese beetle adults. Photo provided by: Brian Kunkel, Ornamentals IPM specialist, University of Delaware
Japanese maple scale on trunk of maple. Photo provided by: Brian Kunkel, Ornamenals IPM Specialist, University of Delaware
Disease Hotline Issue 11
Pine needle rust. Photo provided by: Robert L. Anderson, USDA Forest Service, Bugwood.org
Stump grinding. Photo found at: http://stumpsgrinding.blogspot.com/
Insect Hotline Issue 11
Aster leafhopper. Photo provided by: Whitney Cranshaw, Colorado State University, Bugwood.org
Illustration of potato leafhoppers and damage. Illustration provided by: Mary Foley Benson, USDA; Property of the Smithsonian Institution, Department of Entomology, Bugwood.org
Potato leafhopper. Photo provided by: Steve L. Brown, University of Georgia, Bugwood.org
Friday, June 4, 2010
What's Hot HL Issue 10
Japanese Maple scale and crawlers (purplish). Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware
Common groundsel. Photo provided by: Ohio State Lab Weed Archive, Bugwood.org
Disease Hotline Issue 10
Dutch elm disease from a distance. Photo provided by: William M. Brown Jr., United States, Bugwood.org
Vascular streaking in affected wood. Photo provided by: Paul H. Peacher, USDA Forest Service, Bugwood.org
Galleries of European elm bark beetle and affected wood. Photo provided by: William M. Brown Jr., United States, Bugwood.org
Insect Hotline Issue 10
Lace bugs on hawthorn. Notice the black specs (tarspots). Photo provided by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware