Greenhouse growers have started seeding impatiens and transplanting them into flats, pots or baskets. Also, double impatiens are being rooted and transferred to their final container. According to Michigan State University Extension, the time is right for growers to protect their impatiens by applying fungicides that target downy mildew.
Recommendations have been developed based on research by MSU Plant Pathologist Mary Hausbeck, and her greenhouse research team. Many greenhouse and landscape studies have been conducted over the past two years. PLEASE NOTE: As a result of 2013 research trials and grower input, the 2014 downy mildew recommendations have been altered from last year.
Click here for a conservative example of a fungicide program that has been designed to ensure Michigan’s impatiens are free of downy mildew.
For more information, visit msue.anr.msu.edu