Blast on Creeping Rivergrass (Echinochloa polystachya)

leaf spotting caused by blast (Pyricularia grisea) on creeping rivergrass (Echinochloa polystachya)

Blast disease on Creeping Rivergrass

Above is a photograph of Creeping Rivergrass with spots on the leaves. The disease causing them is blast, the same disease found in rice. In this instance it actually behaves as a mild herbicide slowing down the growth of the plants. I have seen the disease on many grasses over the years and this one has been confirmed by Dr. Groth who was able to isolate blast spores from the lesions a couple of years ago.

9/5/2019 9:15:45 PM
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