Black root rot can affect a wide range of ornamentals in home and commercial landscapes, nurseries, and greenhouses. Black root rot is commonly observed on Japanese and blue hollies, inkberry, pansy, petunia, and vinca. Black Root Rot Facts Symptoms are…
Blog Archives
Japanese Beetles Now Active
Last week, Dr. Dan Potter reported seeing adult Japanese beetles. This is the first report that I have received and signifies the start of the Japanese beetle season. High populations of Japanese beetle were observed in many locations in Kentucky…
Posted in Fruit, Landscape Trees & Shrubs
Dogwood Powdery Mildew
Dogwood is a popular landscape tree throughout Kentucky. However, once infected with powdery mildew, trees can develop an unattractive appearance. The disease is most prevalent during periods of high humidity and in landscapes with reduced air circulation. Some cultivars are…
Posted in Landscape Trees & Shrubs
Spruce Dieback – Needle Cast Diseases May Be To Blame
Blue spruce and Norway spruce are popular landscape plants in Kentucky. However, many factors can cause spruce trees to cast (shed) needles. Casting may be the result of environmental stresses (heavy soil, poor drainage) or fungal diseases. In Kentucky, Rhizosphaera…
Posted in Landscape Trees & Shrubs
Avoid Introduction of Boxwood Blight into the Landscape
Boxwood blight can be devastating to American boxwood cultivars, which are common in the Kentucky landscape. Complete defoliation can occur within a week and plants can die within a single growing season. Use of tolerant cultivars, cultural practices, and fungicides…
Posted in Landscape Trees & Shrubs
Dogwood Anthracnose Spotted
Anthracnose of dogwood is a common problem in Kentucky. Symptoms on landscape and forest dogwoods often first appear during wet periods in late spring. If left unmanaged, the pathogen spreads, eventually resulting in plant death. Selection of resistant varieties and…
Posted in Forest Trees, Landscape Trees & Shrubs
Cedar-Hawthorn Rust
Cedar-hawthorn rust is a common disease of apple, crabapple, hawthorn, and ornamental pear in Kentucky; it also affects quince, mountain ash, pear, and serviceberry. The pathogen overwinters as galls on its alternate hosts, cedar and juniper. Removal of these galls…
Posted in Fruit, Landscape Trees & Shrubs
