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Corn Fungicide Efficacy Table – Updated 2023

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Fungicide Efficacy Table

The Corn Disease Working Group (CDWG) developed ratings for how well fungicides control major corn diseases (efficacy) in the United States. Efficacy ratings for each fungicide was generated by field-testing the materials over multiple years and locations. The ratings are based on the level of disease control and do not directly reflect yield increases obtained from applications of a given product. The tables are based on the most widely marketed chemistries that are labeled for use in corn. This list is not reflective of all chemistries labeled in corn, but represents fungicide efficacy for a number of common foliar diseases. Additional products may be labeled and effective for other diseases (e.g. ear rots). A product’s efficacy may be influenced on application timing, rate, application method, and the level of disease severity in a field. Many products have use restrictions, and the labels must be followed for application instructions.

The Efficacy Table can be found on the second page of the document by the CDWG.

Fungicide Efficacy Table–Updated 2023