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Blast on Creeping Rivergrass (Echinochloa polystachya)

Blast on Creeping Rivergrass (Echinochloa polystachya) published on No Comments on 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.

 

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