Plant Disease Diagnostic Lab Highlights

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.

Figure 1. Powdery mildew spores in chains on an infected Kentucky bluegrass leaf. Powdery mildew has been common on bluegrass in shaded locations during the past several weeks. (Photo: Brenda Kennedy, UK)

Figure 1. Powdery mildew spores in chains on an infected Kentucky bluegrass leaf. Powdery mildew has been common on bluegrass in shaded locations during the past several weeks. (Photo: Brenda Kennedy, UK)

Diseases diagnosed during the past week have included Pythium root rot on tobacco transplants; anthracnose on blackberry canes; blossom end rot, Pythium root rot, Sclerotinia stem rot, and chemical injury on tomato.

Landscape ornamental and turf samples included black spot on rose; needle rust and scale on pine; Stigmina needle blight on spruce; and powdery mildew on bluegrass (Figure 1).

 

By Julie Beale and Brenda Kennedy, Plant Disease Diagnosticians

 

 

Posted in Plant Disease Diagnostic Lab