Late blight was found and confirmed north of Pasco, WA in the first week of July. The infected field was treated with a fungicide 12 days prior to the report. North of Pasco, fields should be treated with fungicide on a 7 day application schedule. As of the writing of this post, the Syngenta late blight hotline had not received any other reports of infection.

Fields with late blight should be on a 5 to 7 day fungicide application schedule. Sprinkler irrigated fields should be treated with a late blight fungicide 1 to 7 days before any major rain. Orondis® Opti fungicide offers control you can rely on, even under heavy disease pressure.

For more local late blight information in Washington, consult Potatoes at WSU. For up-to-date information on late blight conditions in WA, ID, ND, OR, and MI, call into the Syngenta late blight hotlines.

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