Invasive Pests Invasive pests (plants, insects, diseases, and others) cause enormous economic damage, as well as environmental damage. These displace or destroy beneficial and native plants and animals, reduce biodiversity. The annual … [Read more...]
Bacterial Wetwood
The client has a large oak tree that is losing sap. There is a bad odor and a hole at the base of the tree where sap is oozing. What is causing this and how should it be handled? DIAGNOSIS /RECOMMENDATION The problem is termed bacterial … [Read more...]
Purple Eye Leaf Spot on Maples
The client called in with a concern about a leaf spot on maple leaves. The Virginia Tech Plant Diagnostic Lab identified the leaf spot as purple-bordered (or purple eye) leaf spot (Phyllosticta minima). This is a very common disease of maples … [Read more...]