Conditions favorable for foliar diseases of corn
Recommendations for In-season Management of Goss’s Wilt:
Goss’s wilt is a bacterial disease, and therefore fungicide applications will not be effective at reducing disease development. There are several products promoted for in-season management of Goss’s wilt, however, Indiana research indicates that these products do not consistently reduce disease once symptoms are present on the plant. If symptoms of Goss’s wilt are suspected in a field, please remember to have the sample confirmed by a diagnostic lab. Fields with confirmed Goss’s wilt should be planted to a hybrid that is more resistant to Goss’s wilt in subsequent years. Tillage and crop rotation will also help reduce the amount of residue that can harbor bacteria for the next corn crop. For more information on Goss’s wilt, please read Purdue Extension Bulletin BP-081-W: <https://ag.purdue.edu/btny/Extension/Pages/ExtPubs.aspx>.
Before Deciding on a Management Strategy, Keep This in Mind:
The thresholds and recommendations available for in-season management decisions for any disease are not hard and fast rules. It is important to remember that disease severity can be unpredictable in Indiana, even when factors favoring disease are present. Before deciding on in-season management of any foliar disease, consider threshold guidelines, cropping practices, planting date, predicted weather conditions and economic factors, and manage expectations for what type of yield response a in-season fungicide/bactericide application will provide.
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