Saturday, May 31, 2008
Friday, May 30, 2008
What's Hot HL Issue 9
Crabgrass. Photo by: Gordon Johnson, Extension Agent, Agriculture and Commercial Horticulture, University of Delaware, Kent County.
Dunce cap stage of bagworms. Bag is held upright by early instar bagworms and is called the 'dunce cap' stage. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Calico scales. Photo by: Raymond Gill, California Department of Food and Agriculture, Bugwood.org.
Labels:
2008,
bagworms,
calico scale,
crabgrass,
Hot in May,
soft scales
Disease Hotline Issue 9
Pyracantha scab.
Red thread mycelium.
Red thread (Laetisaria). Disease photos by: Nancy Gregory, Plant Diagnostician, University of Delaware.
Labels:
2008,
Disease,
May,
pyracantha scab,
red thread
Thursday, May 29, 2008
Insect Hotline Issue 9
Fletcher scale and eggs. Photo by: Tracy Wooten, Sussex County Extension Agent-Horticulture, University of Delaware.
Lecanium scale (Fletcher scale) on bald cypress. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware
Lecanium scale on oak. Photo by: Andrew J. Boone, South Carolina Forestry Commission, Bugwood.org.
Labels:
2008,
fletcher scale,
Insects,
lecanium scale,
soft scales
Friday, May 23, 2008
Disease Hotline Issue 8
Both pictures above could be caused by Spiny witchhazel aphid or psyllids on river birch. Photos by: Nancy Gregory, Plant Diagnostician, University of Delaware.
Close-up of ash rust. Photo by: Nancy Gregory, Plant Diagnostician, University of Delaware.
Labels:
2008,
ash rust,
Disease,
May,
river birch
What's Hot HL Issue 8
Woolly beech aphid infestation. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Woolly beech aphids. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Imported willow leaf beetle larvae. Photo by: Paul Weston, Cornell University, Bugwood.org.
Imported willow leaf beetle adults. Photo by: David Cappaert, Michigan State University, Bugwood.org.
Labels:
2008,
Hot in May,
imported willow beetle,
woolly beech aphids
Culture Hotline Issue 8
Insect Hotline Issue 8
Azalea bark scale. Photo by: Clemson University - USDA Cooperative Extension Slide Series, , Bugwood.org.
Azalea bark scale. Photo by: United States National Collection of Scale Insects Photographs Archive, USDA Agricultural Research Service, Bugwood.org.
Azalea leafminer. Photo by: Natasha Wright, Florida Department of Agriculture and Consumer Services, Bugwood.org.
Whitefly on azalea. Photo taken by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Labels:
2008,
azalea bark scale,
azalea leafminer,
azalea whitefly,
Insects,
May
Thursday, May 15, 2008
Insect Hotline Issue 7
Redheaded pine sawfly. Photo by: G. Keith Douce, University of Georgia, Bugwood.org.
Redheaded pine sawfly pupae (cocoons). Photo by: Lacy L. Hyche, Auburn University, Bugwood.org.
Redheaded pine sawfly eggs. Photo by: Lacy L. Hyche, Auburn University, Bugwood.org.
Redheaded pine sawfly female. Photo by: Lacy L. Hyche, Auburn University, Bugwood.org.
Cercropia larva. Caterpillar with 5 prolegs. Photo found at www.wormspit.com/cercropia
Cercropia larva. Picture focuses on the crochets found on the prolegs.
European pine sawfly. Photo by: Petr Kapitola, State Phytosanitary Administration, Bugwood.org.
European pine sawfly. Photo by: Steven Katovich, USDA Forest Service, Bugwood.org.
European pine sawfly eggs. Photo by: Andrea Battisti, Università di Padova, Bugwood.org.
European pine sawfly male. Photo by: Louis-Michel Nageleisen, Département de la Santé des Forêts, Bugwood.org.
European pine sawfly female. Photo by: Louis-Michel Nageleisen, Département de la Santé des Forêts, Bugwood.org.
Labels:
2008,
European pine sawfly,
Insects,
May,
redheaded pine sawfly
Thursday, May 8, 2008
What's Hot HL Issue 6
Rizosphaera needlecast on Norway spruce.
Rizosphaera needlecast on Norway spruce, closeup. Rizosphaera photos by: Nancy Gregory, University of Delaware.
Woolly beech aphid. Photo by: Whitney Cranshaw, Colorado State University, Bugwood.org.
Heavy pine bark adelgid infestation. Photo by: USDA Forest Service - Northeastern Area Archive, USDA Forest Service, Bugwood.org.
Light infestation of pine bark adelgids. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Boxwood leafminer adult and blistered leaf. Photo by: John A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org.
Boxwood leafminer larvae. Photo by: Nancy Gregory, Plant Diagnostician, University of Delaware.