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Common Names of Plant Diseases
In 1978, The American Phytopathological Society established a committee to develop listings of plant pathogens and the diseases they incite. By act of APS Council, the common names in these listings are now official names for use in APS journals ...More…
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Plant Diseases Development and Management
North Dakota State University — Plant Diseases Development and Management -- basic concepts and principles of how diseases develop and how they are managed for commercial growers, commercial applicators, home gardeners and others The interactions between plants and disease ...More…
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Wire Stem and Bottom Rot of Cabbage
Virginia Tech Extension — Wire stem and bottom rot diseases of crucifers (cole crops) are both caused by the soil-borne fungus Rhizoctonia solani. These diseases can be easily overlooked in the plant bed. They may cause losses in stand, yield, or quality, depending on the ...More…
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Verticillium Wilt of Shade Trees
Virginia Tech Extension — Verticillium wilt is a serious vascular wilt disease that affects a broad array of shade tree species. Verticillium wilt is a serious vascular wilt disease that affects a broad array of shade tree species. The fungi that cause Verticillium wilt, ...More…
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Timber Rot of Tomato
Virginia Tech Extension — Timber rot, a stem rot disease of tomato, is caused by the fungus Sclerotinia sclerotiorum. The fungus has a wide host range and can also attack beans, cabbage, carrots, celery, cucumbers, lettuce, onions, peas, pumpkins, and squash. Timber rot, ...More…
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Sooty Mold of Conifers and Hardwoods
Virginia Tech Extension — Sooty molds of trees and shrubs commonly occur throughout Virginia on conifers, hardwoods, and other plant species Sooty molds of trees and shrubs commonly occur throughout Virginia on conifers, hardwoods, and other plant species. These fungi are ...More…
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Septoria Leaf Spot of Tomato
Virginia Tech Extension — Septoria leaf spot of tomato, caused by the fungus Septoria lycopersici, is one of the most common and destructive diseases of tomato in Virginia. Septoria leaf spot of tomato, caused by the fungus Septoria lycopersici, is one of the most common ...More…
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Selected Vegetable Diseases
Virginia Tech Extension — Allen Straw, Extension Specialist, Southwest Virginia Agricultural Research and Extension Center. Check for reddish-brown or black sunken spots or blotches on leaves, stems, pods, and/or fruits. Practice two-year or longer rotation. Avoid ...More…
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Rose Rosette Disease
Virginia Tech Extension — Rose rosette disease (RRD), a disease believed to be caused by a virus, has been spreading through much of the wild rose population of the midwestern, southern and eastern United States. Chuan Hong, Extension Plant Pathologist, Hampton Roads ...More…
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Rose Black Spot
Virginia Tech Extension — Rose black spot, caused by the fungus Diplocarpon rosae, is the most common cause of defoliation of landscape roses Rose black spot, caused by the fungus Diplocarpon rosae, is the most common cause of defoliation of landscape roses in Virginia. ...More…
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Problem-free Trees for Virginia Landscapes
Virginia Tech Extension — Many of the tree species commonly planted in Virginia landscapes suffer from disease problems. Although some diseases can be cured, most must be controlled on a preventative basis. The best option for new plantings is to choose species that have ...More…
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Problem-free Shrubs for Virginia Landscapes
Virginia Tech Extension — All of the species or cultivars described have been chosen for their relative disease- and insect-free qualities and their desirable horticultural attributes. The most effective form of plant disease control in the landscape is prevention. ...More…