Greenhouse and high tunnel environments, which tend to be warm and humid, often create ideal situations for disease development. Because diseases can cause extensive damage, their management is essential to production of high quality, marketable products. While challenging, these environments…

Taxus (yew) is an evergreen shrub commonly found in Kentucky landscapes. Numerous conditions can cause these shrubs to exhibit yellowing and browning symptoms. Taxus troubles can be the result of diseases, insects, or adverse growing conditions. Pinpointing the specific cause…

Numerous plant diseases impact fruit crops throughout Kentucky. Factors such as plant growth stage, as well as rainfall, temperature, and other weather conditions, can be used to determine risk for plant disease.  Disease prediction models can aid growers in assessing…

Spruce trees, particularly blue spruce (Picea pungens) and Norway spruce (Picea abies), are popular landscape trees in Kentucky. Unfortunately, these trees present problems for homeowners when they show evidence of poor vigor, dieback, or needle drop.  This publication discusses the…

Dothistroma needle blight afflicts some of the pine species commonly planted in Kentucky landscapes, particularly Austrian and Mugo pines. This disease results in brown needles, which may or may not drop from branches, and unsightly trees. This fact sheet covers…

Black rot is a common and destructive disease that affects plants in the crucifer family (cole crops) at any growth stage. Black rot has also been referred to as bacterial blight, black stem, black vein, stem rot, or stump rot.…

Eastern white pine (Pinus strobus) is a popular conifer in many Kentucky landscapes; however, this species is subject to browning as a result of various environmental and disease problems. In Kentucky, brown needles on white pine are often caused by…