What is in this article?:
- Peanut white mold conditions hit Georgia
- How to handle white mold
• The “backbone” of white mold management remains the use of appropriate fungicides between 60 and 102 days after planting. This is the historical “white mold management block”.
THERE HAS BEEN a revolution in the management of white mold over the past five years. The general strategy? Get their first with the most, concentrating the right fungicides to the target area earlier than in years past.
How to handle white mold
University of Georgia Cooperative Extension recommendations for the management of white mold are:
- All growers should use some fungicide program for the management of white mold over the period of 60 to 102 days after planting. The specifics of that program is influenced by the severity of the risk to white mold (see Peanut Rx) and the fungicides that are included in the fungicide program.
- All growers should consider the opportunity to tank-mix tebuconazole (7.2 fl oz/A) with chlorothalonil or pyraclostrobin (Headline) early in the season. Such a tank-mix is affordable and provides a start to leaf spot and white mold control. (Growers who will use a full-season Provost, Quash or tebuconazole program should carefully consider fungicide-resistance issues before starting the season with tebuconazole.)
- Applying fungicides for the management of white mold at night or in the very early morning while leaves are still folded is an important tactic to optimal placement of the fungicide in the crown of the plant. Some thought should be given to maintaining best control of leaf spot since only the underside of the leaf will be treated at night; however this is easily addressed with the use of a systemic fungicide.
- The newest tool in the management of white mold is the use of a BANDED full-rate application of Proline (or Abound) in a narrow swath over the young peanut plants. Depending upon weather and risk, this application can be made anywhere between two weeks and six weeks after planting. Earlier applications are likely most effective when risk to white mold (early-season hot weather and high Peanut Rx risk value) is greatest. Delaying the application until four-to-five weeks after planting is more appropriate in many cases and also reduces or even eliminates the need for early-season leaf spot fungicide sprays.
Bob Kemerait is a plant pathologist with the University of Georgia Cooperative Extension.
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