creeping bentgrass
Yellow tuft on Penncross creeping bentgrass at Hokkaido
Yellow Tuft and Large Patch in Japan
Precipitation across much of Japan has been above average this year, and it is no surprise then to be seeing two diseases that are associated with wet growing conditions: large patch (Rhizoctonia solani) and yellow tuft (Sclerophthora macrospora). I've seen ...
Botrytis, Dog's Footprint, and Hot July Weather
Megan informed us last year that there are some edible (or drinkable) plant pathogens. I saw a few turfgrass pathogens during an early winter visit to Australia last month — some dollar spot on seashore paspalum, leaf spots on Cynodon, pink snow mold on creeping bentgrass, and the mysterious and as yet unidentified fairway patch (black fungus) disease affecting Cynodon fairways at Sydney. But my favorite disease was a drinkable one in the Barossa Valley of South Australia: the Peter Lehmann 2009 Botrytis Semillon. Ten summers ago, before I went to grad school, I was a golf course superintendent in...
White plants: an unusual symptom.
Today I got a sample in from a golf course superintendent in New York. The sample was thinning and several of the plants had a bleached appearance almost like you would see following the application of Tenacity (they didn’t put any of this out BTW). Upon further inspection, there were no signs of any pathogen (no Pythium, bacteria, or any other fungi…I don’t check for nematodes so not sure about this). One thing that was interesting was the elongation (not etiolation) of the stembases and stolons. The symptomatic plants had roots being initiated a good inch or so down from...
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