Scout for Tomato Late Blight in NC (July 30, 2019)

— Written By

Conditions have been conducive for late blight on tomato to occur, especially in western North Carolina. Heavy morning dews and cool, wet weather favor this disease. The disease has been reported in east Tennessee.

Growers should monitor frequently for symptoms of late blight and begin applying systemic fungicides. Tomato and potato are extremely susceptible to this disease and can be significantly defoliated within days if environmental conditions are conducive. Active scouting and preventive fungicide applications to protect tomato crops in NC from late blight is recommended.

Late blight on tomato

Late blight on tomato

For more information about late blight and how to manage it, see the tomato late blight fact sheet, which lists effective products against late blight. Control recommendations are also available in the USAblight website, where you can register to receive text and/or email alerts when new disease outbreaks are reported.

Late blight on tomato

Late blight on tomato

If you think you have late blight on your tomatoes, please contact your local Extension Agent and send photos and/or physical samples to the NC State University Plant Disease and Insect Clinic. If late blight is confirmed in your samples by an expert, please submit a report to the USAblight website to alert other growers. The USAblight website also contains information about disease identification and control.

Late blight on tomato foliage

Late blight on tomato foliage