Seminole Crop E News

Agricultural News for Farmers and Agribusiness in SW Georgia

Disease in Peanut

Posted by romeethredge on July 30, 2011

Peanuts are looking good but white mold is moving in strongly this week. We have above ground white mold and below ground and a faker, Phanerochaete. Remember that even with good white mold materials we will still see small hits of the disease. What we don’t want to see is it moving down the row, and big affected areas.

Dr. Kemerait, UGA Extension Plant Pathologist says “It is leaf spot and white mold weather!”

Here’s Phanerochaete, it looks bad and all but really doesn’t cause us problems. It looks a lot like white mold , sclerotium rolfsii, but there are some differences. It may look white at first but often turns a n orangey color , also it’ll be toothy looking. The main way to tell the difference however is to scrape some of it away from the peanut stem and see if the plant tissue is affected beneath it. If the plant is fine then it’s likely the imposter.

Here’s the bad boy, underground white mold. You can see the white mycelium and one of the pods was starting to rot. This can be a real problem and can really only be found with scouting and pulling up random plants. Often a problem in hot dry conditions.

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