Peanut Disease Advisories Will Start Soon

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Peanut growers will begin foliar disease control programs soon. In well rotated fields, the first fungicide spray for leaf spot control should be applied when peanuts reach R3, or when about half the plants in a particular planting have at least one pod starting to develop. In most years, peanuts will reach R3 around July 7. Reapply foliar fungicides every two weeks, or follow the Peanut Leaf Spot Advisory.

The North Carolina Peanut Leaf Spot Advisory is a cooperative effort by the State Climate Office of North Carolina and the Department of Plant Pathology at NC State University. The advisory is a safe way to minimize fungicide applications by spraying only when weather conditions favor disease.

We also provide spray advisories to warn growers when conditions are right for Sclerotinia blight. Sprays for Sclerotinia blight control are necessary only in fields with a history of disease. Growers should start scouting for Sclerotinia blight in early July and follow advisories to determine whether sprays are necessary.
Leaf spot and Sclerotinia advisories are delivered by daily emails throughout the summer. Contact Barbara Shew or your County Extension Office if you would like to receive peanut disease advisories. Advisories are also available on-line at

For more information about peanut diseases and their management, see 2013 Peanut Information