Rutgers Cooperative Extension
Springtime 2014 seemed like it would go on forever. Temperatures remained cool for an extended period and we had plenty of moisture, which are the conditions that always result in shade tree leaf diseases. Here are a few we saw…
Ash rust, caused by Puccinia sparganioides. Photo: Sabrina Tirpak, Rutgers PDL
Oh no! Not more leaf spot posts! This is the last one for now, I promise. First thing first, we had a nice sample from a perennial ryegrass baseball field that was submitted for dollar spot diagnosis, which it had, but it was also covered with leaf lesions caused by the fungus Bipolaris sorokiniana. Sabrina thought it would be nice to share a photo with you.
Leaf spots caused by Bipolaris sorokiniana on perennial ryegrass leaves. Photo: Sabrina Tirpak, Rutgers PDL
Red leaf spot of creeping bentgrass is a poorly understood leaf spot disease in turfgrass. Almost all golf course superintendents think they have it at one point or another, but nobody ever really does.
Red leaf spot on creeping bentgrass putting green. Photo: Richard Buckley, Rutgers PDL
The crew of the Plant Diagnostic Laboratory are always on the hunt for new and exciting examples of plant damage. Last week, out walking her dog, Sabrina Tirpak our Principle Technician and photographer happened upon a red maple with these amazing red leaf spots.
Dramatic leaf spots caused by the ocellate maple gall midge, Acericecis ocellaris. Photo: Sabrina Tirpak, Rutgers PDL
An unexpected sample walked into the laboratory at the end of last week. Net blotch, which is caused by the fungus Drechslera dictyoides, was subsequently diagnosed on a sample of turf-type tall fescue.
Net blotch leaf lesions on tall fescue. Photo: Sabrina Tirpak, Rutgers PDL
Tan lesions due to the fungus Cladosporium variable on spinach. Photo: Sabrina Tirpak, Rutgers PDL
Spinach samples were submitted to the Plant Diagnostic Laboratory today from a local organic grower. They were submitted for the diagnosis of a leaf spot disease, but closer evaluation revealed much more. [Read more…]
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