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 |
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 |
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 |
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 |
Anthracnose - A Fungal Disease of Shade Trees
Anthracnose is a name for a group of diseases caused by several closely related fungi that attack many of our finest shade trees. It occurs most commonly and severely on sycamore, white oak, elm, dogwood, and maple. Other host plants that are ... [... more]
Virginia Tech Extension |
Crown Gall of Woody Ornamentals
Authors: G. H. Lacy, Professor of Plant Pathology, Department of Plant Pathology, Physiology and Weed Science, Virginia Tech; and Mary Ann Hansen, Extension Plant Pathologist, Department of Plant Pathology, Physiology and Weed Science, Virginia ... [... more]
Virginia Tech Extension |
A Guide to Successful Pruning: Pruning Basics and Tools
Pruning is a regular part of plant maintenance involving the Another response to pruning occurs inside plants. around wounded areas, walling off or compartmentalizing the wounds. The branch collar is the swollen area of trunk tissue that forms ... [... more]
Virginia Tech Extension |
Eriophyid Mites on Pine
Needle Sheath Mite, also called the Pine Bud Mite, is a mite that can cause problems for pines in Virginia. Although sporadic, they can be serious in some plantings. These mites primarily attack white, Scotch, Austrian, and red pines. The ... [... more]
Virginia Tech Extension |
Fertilizing Trees and Shrubs
Trees and shrubs are the foundation of a good landscape and an important part of your home. They lend not only beauty and shade, but increase the value of your property as well. It pays to care for them properly. In urban or suburban ... [... more]
Virginia Tech Extension |
Fertilizing Landscape Trees and Shrubs
Authors: Bonnie Appleton, Extension Horticulturist, and Kathy Kauffman, Graduate Student, Hampton Roads Agricultural Research and Extension Center Maintenance programs should be developed for trees and shrubs in both residential and commercial ... [... more]
Virginia Tech Extension |
