Impatiens Downy Mildew Confirmed in Iowa

Impatiens downy mildew was confirmed in Iowa last week. Several samples of impatiens planted in a garden bed in Polk County were sent in to the Plant and Insect Diagnostic Clinic for confirmation.

Plants started showing yellowing leaves and in a matter of days started dropping their leaves, leaving bare stems behind. Impatiens downy mildew can spread readily to neighboring plants and beds. Suspect plants should be bagged and removed from garden as soon as possible. For more information visit the Horticulture & Home Pest Newsletter form June 27, 2012.

Impatiens downy mildew on lower leaf surface.

Impatiens downy mildew on lower leaf surface.


Links to this article are strongly encouraged, and this article may be republished without further permission if published as written and if credit is given to the author, Horticulture and Home Pest News, and Iowa State University Extension and Outreach. If this article is to be used in any other manner, permission from the author is required. This article was originally published on August 29, 2012. The information contained within may not be the most current and accurate depending on when it is accessed.