Source: NCSU COOPERATIVE EXTENSION, 7/28/21


Late blight on tomato has been confirmed near Macon County, NC on July 27, 2021.
Samples have been sent to Cornell University for genotyping and sensitivity to mefenoxam — the active ingredient in Ridomil Gold.

An update will follow.
Growers should monitor frequently for symptoms of late blight and begin applying systemic fungicides. Tomatoes and potatoes are extremely susceptible to this disease and can be significantly defoliated within days if environmental conditions are conducive. Heavy morning dews and cool, wet weather favor this disease. Active scouting and preventive fungicide applications to protect tomato crops in North Carolina from late blight is recommended.

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