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Spinach Growers: Downy Mildew Got You Down?

January 10, 2017

You’re not alone. Downy mildew is the most damaging disease in spinach production almost everywhere spinach is grown. Because of the natural layered way spinach grows, and the added density of plants in most fields, conditions are ideal for this disease to spread rapidly. Therefore, it’s important to be proactive in management practices.

The pathogen that causes downy mildew, Peronospora farinosa f. sp. spinaciae, thrives in wet, cool conditions, making cultural controls such as reducing leaf wetness a key preventive approach. Additionally, using a fungicide like Orondis® Ultra, currently sold as a multi-pack product combining Orondis Ultra A and Orondis Ultra B, offers excellent control of downy mildew in spinach.

Orondis Ultra fungicide is currently approved for use in 46 states, with approvals pending in California and others. It combines 2 products, Orondis and Revus® fungicides, into a game-changing tool for control of downy mildew in spinach.


To learn whether Orondis Ultra is approved for use in your area, visit this page. For more information, talk to your local Syngenta representative.

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All photos are the property of Syngenta or are used with permission.

©2017 Syngenta. Important: Always read and follow label instructions. Some products may not be registered for sale or use in all states or counties. Please check with your local extension service to ensure registration status. Orondis Ultra is a combination of separately registered products: Orondis Ultra A and Orondis Ultra B fungicides. Orondis®, Revus® and the Syngenta logo are registered trademarks of a Syngenta Group Company.