Question

I heard someone speak at a conference recently about spraying fungicides on dew-covered turf. They mentioned that some fungicides may not be as effective if applied to wet turf. Monday morning is our normal spray day since the course is closed until 12 noon and many times the turf is still wet when we spray. I really do not have any choice, what can I do?

Answer

Everyone has questions. And BASF Professional Turf has answers.

Contact fungicides (chlorothalonil, mancozeb) provide best disease control when applied to dry turf (they need to stick to the leaf). Other fungicides, which can redistribute themselves, have been shown to perform similarly on dew-covered or dry turf. However, it makes most sense to apply to dry turf to maximize the amount of product retained on the foliage in the case of most foliar diseases. I suggest that you remove dew prior to the application to maximize performance.