Black spot on roses. Photo by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Black spot on rose. Photo by: Division of Plant Industry Archive, Florida Department of Agriculture and Consumer Services, Bugwood.org.
Crabapple scab on crabapple tree leaves. Photo by: Bob Mulrooney, Plant Pathologist, University of Delaware.
Crabapple scab on crabapple fruits. Photo by: Bob Mulrooney, Plant Pathologist, University of Delaware.
Tag Archives: black spot
What’s Hot HL Issue 10
Black spot on roses. Photo by: Brian Kunkel, Ornamentals IPM specialist, University of Delaware.
Powdery Mildew on common lilac. Photo by: Whitney Cranshaw, Colorado State University, Bugwood.org.
Fire blight on pear. Photo by: Nancy Gregory, Plant Diagnostician, University of Delaware.
Elm pouch gall (caused by aphids).
Elm pouch gall (caused by aphids). Photos of elm pouch galls by: Brian Kunkel, Ornamentals IPM Specialist, University of Delaware.
Rose slug sawfly feeding damage. Photo by: Tracy Wooten, Sussex County Extension Agent – Horticulture, University of Delaware.
Rose slug sawfly. Photo by: John A. Weidhass, Virginia Polytechnic Institute and State University, Bugwood.org.