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Articles 1 to 12 of 24:
Sooty Mold of Conifers and Hardwoods
Authors: Mary Ann Hansen, Extension Plant Pathologist, Department of Plant Pathology, Physiology and Weed Science, Virginia Tech; and Eric Day, Extension Entomologist, Department of Entomology, Virginia Tech Sooty molds of trees and shrubs ... [... more]
Virginia Tech Extension |
Rose Black Spot
Rose black spot, caused by the fungus Diplocarpon rosae, is the most common cause of defoliation of landscape roses in Virginia. The disease is less of a problem in greenhouses where relative humidity can be carefully controlled. Susceptible ... [... more]
Virginia Tech Extension |
Major Diseases of Boxwood
English boxwood, a popular shrub in traditional gardens in Virginia, and American boxwood, used in both traditional and contemporary plantings, are susceptible to several diseases that can decrease their effectiveness in established plantings. ... [... more]
Virginia Tech Extension |
Hollyhock Rust
Rust, caused by the fungus, Puccinia malvacearum, is the most common disease of hollyhock. Under favorable environmental conditions, the disease spreads rapidly from leaf to leaf. Older leaves are usually killed, and plants become unsightly. Fig. ... [... more]
Virginia Tech Extension |
Powdery Mildew of Ornamental Plants
Powdery mildew fungi attack a variety of ornamental plants grown in Virginia. Photinia, crape myrtle, dogwood, lilac, Japanese euonymus, wintercreeper euonymus, and many crabapple cultivars are highly susceptible and can be seriously damaged by ... [... more]
Virginia Tech Extension |
Fire Blight of Ornamentals
Fire blight, caused by the bacterium Erwinia amylovora, is a serious disease of many ornamental species in the Rosaceae family. Certain varieties of apple, flowering crabapple, pear, pyracantha, and quince are highly susceptible. Other plants, ... [... more]
Virginia Tech Extension |
Verticillium Wilt of Shade Trees
Verticillium wilt is a serious vascular wilt disease that affects a broad array of shade tree species. The fungi that cause Verticillium wilt, Verticillium albo-atrum and V. dahliae, are soil-borne and infect through the roots. They can gradually ... [... more]
Virginia Tech Extension |
Juniper Tip Blights
In Virginia, juniper tip blight is caused by one of two different fungi, Phomopsis juniperovora or Kabatina juniperi. Symptoms of the two diseases are identical; however, some aspects of their control differ. Therefore, correct identification of ... [... more]
Virginia Tech Extension |
Entomosporium Leaf Spot of Photinia
Photinia, a shrub belonging to the rosaceous family, is widely grown in nurseries and landscapes in the eastern United States. Several species, including Photinia serrulata and Photinia glabra, and a hybrid, Photinia x fraseri, are grown for ... [... more]
Virginia Tech Extension |
Foliar Diseases of Dogwood
Fungal diseases can mar the foliage and bracts of Virginia's state flower, the native flowering dogwood, Cornus florida. The diseases, spot anthracnose and Septoria leaf spot, appear every year to some degree and in most years cause little ... [... more]
Virginia Tech Extension |
Botrytis Blight of Peony
Botrytis blight is a common fungal disease that confronts the peony grower each spring. The fungus Botrytis cinerea blights stems, buds, and leaves and can cause plants to look unsightly. This fungus causes disease on a wide variety of herbaceous ... [... more]
Virginia Tech Extension |
Powdery Mildew-Resistant Woody Ornamentals
Powdery mildew is a common fungal disease of many ornamental plant species. Although plants are not often killed by the disease, they may become unsightly when heavy fungal growth develops on leaves and flowers. Controlling the disease on ... [... more]
Virginia Tech Extension |
Note: Growing Results finds articles on many different web sites, including Virginia Tech Extension. No affiliation or endorsement of Virginia Tech Extension is implied by this indexing and the presentation of search results.
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