The following plant disease highlights from the UK Plant Disease Diagnostic Laboratories represent recent sample submissions from field crops, fruit and vegetables, and ornamentals.
During the past week, field crop diagnoses included potassium deficiency on soybean; Pythium root rot, transplant shock, temporary phosphorus deficiency, environmental/physiological leaf spotting, brown spot, angular leaf spot, soreshin, black shank, Fusarium wilt, and tomato spotted wilt virus on tobacco.
On fruit and vegetable samples, diagnoses included cedar-apple rust and fire blight on apple; bacterial leaf spot and oriental fruit moth injury on peach; Pythium root/stem rot on bean; bacterial wilt on cantaloupe; bacterial stalk rot on sweet corn; Pythium root/stem rot and anthracnose on pepper; Pythium root rot, buckeye rot, Septoria leaf spot, leaf mold, and Fusarium wilt on tomato; Alternaria leaf spot and Pythium root rot on watermelon.
On ornamentals and turf, we diagnosed black spot and rose mosaic virus on rose; Volutella canker and Macrophoma leaf blight on boxwood; Cytospora canker on cherry; leaf blister on elm; anthracnose on maple; and brown patch on fescue.
By Julie Beale and Brenda Kennedy, Plant Disease Diagnosticians