Plant Disease Diagnostic Lab Highlights

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 greenhouse/high tunnel vegetables during February have included Botrytis gray mold on lettuce; white mold (Sclerotinia) on carrot and mustard; tomato spotted wilt virus and Pythium damping off on tomato; Rhizoctonia crown rot (progressing into leaf blight) on spinach.

On greenhouse ornamentals we have diagnosed Pythium root/stem rot on angelonia; Pythium damping-off on creeping thyme; black root rot on calibrachoa; crown gall on lobelia; and blight (Calonectria) on boxwood.

Other ornamental samples included black knot on Prunus; wet feet on holly; and Rhizosphaera needle cast on spruce.

 

By Julie Beale and Brenda Kennedy, Plant Disease Diagnosticians

 

 

Posted in Plant Disease Diagnostic Lab