The following plant disease highlights from the University of Kentucky Plant Disease Diagnostic Laboratories represent recent sample submissions from field crops, fruit, vegetables, and ornamentals.
Recent agronomic samples have included frogeye leaf spot on soybean; black shank, frogeye, and angular leaf spot on tobacco.
On vegetable crops, we have seen angular leaf spot on cucumber; downy and powdery mildews on summer squash (yellow and zucchini); and Pythium cottony leak on winter squash.
On ornamentals and turf, we have diagnosed foliar nematode on Japanese anemone; Fusarium wilt, Rhizoctonia web blight, and Pythium and Rhizoctonia root rots on chrysanthemum; Pythium root rot on pansy; powdery mildew on ninebark; Cercospora leaf spot on honeylocust; anthracnose and Phyllosticta leaf spot on maple; scab on pecan; Phloeospora leaf spot on walnut; Rhizosphaera needlecast on spruce; and anthracnose on bentgrass.
By Julie Beale and Brenda Kennedy, Plant Disease Diagnosticians