Questions with Nancy Rechcigl

Questions with Nancy Rechcigl

Advertorial - Ask the Experts: Fungicides

Syngenta’s technical services manager provides rotation tips and explains how growers should approach fungicide selection.

November 7, 2022

Photos courtesy of Syngenta

NM: How should growers approach their fungicide selection?

NR: Choosing the right fungicide can depend on many different factors including what ornamental crop you are planning to apply it to and the disease you are targeting. Growers should also pay attention to the modes of action of each fungicide. Some fungicides offer systemic or translaminar movement, while others can offer both. It is also crucial to read the product label before deciding on a fungicide as some products on the market may not be approved for certain use sites.

NM: What fungicides does Syngenta offer?

NR: Our comprehensive fungicide portfolio makes it easy to strengthen any disease management program. Our 15 fungicide products, including our latest innovation Postiva® fungicide, are powered by modes of action in 10 different FRAC Groups. When used in a rotation they help prevent disease resistance and provide reliable, comprehensive control. The following chart breaks down our fungicide portfolio by FRAC Group and the diseases they control:

NM: How often should you rotate fungicides to prevent resistance?

NR: We recommend growers only make one or two applications of the same product (if the label allows) before rotating to a different class of chemistry.

NM: What Syngenta products should growers rotate in nurseries?

NR: For nursery production, we recommend a rotation of Postiva, Mural®, Palladium®, Concert® II*, Daconil® and Segovis® fungicides. Between these six fungicides, growers can effectively protect their crops from Fusarium, Botrytis, leaf spots, powdery mildew, downy mildew, Pythium, Phytophthora, Rhizoctonia and rusts.

NM: Can I incorporate fungicide rotation into an agronomic program?

NR: We have developed a variety of agronomic programs that address the most common diseases and insects and provide a framework for rotating products and modes of action. To view our agronomic programs, visit

Learn more about our full portfolio at

*Concert II is not labeled for use in greenhouses. All photos are the property of Syngenta or are used with permission.
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Photos courtesy of Syngenta