Late blight confirmed on potato in Simcoe County
Late blight has been confirmed on potatoes near Alliston, Ont.
Late blight has also been recently identified in Michigan, Wisconsin and New York. Michigan and Wisconsin has identified the strain as US-23. It is likely that the Ontario sample is the same but the sample has been sent to AAFC Lethbridge to confirm. The US-23 strain is susceptible to Ridomil (metalaxyl). Many fields are nearing the end but action should be taken to prevent tuber infections, especially in later fields.
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