The following plant disease highlights from the University of Kentucky Plant Disease Diagnostic Laboratories represent recent sample submissions from vegetables and ornamentals.
Diseases diagnosed on vegetable crops in greenhouse/high tunnel production during January have included black rot (Xanthomonas campestris) on kale (also on field-grown Brussels sprouts); drop on lettuce, and white mold on fennel (Sclerotinia sp.); and tobacco mosaic virus on tomato.
On ornamentals, we have diagnosed powdery mildew on bluegrass; Armillaria root rot on apple; and Rhizosphaera needle cast on spruce.
By Julie Beale and Brenda Kennedy, Plant Disease Diagnosticians