plant diseases en Downy Mildew on Horticulture Day <p></p><p>A new disease is appearing in Iowa.&nbsp; Downy mildew is taking its toll on the state's impatiens, and may have gardeners rethinking their landscapes.&nbsp; This and other plant disease and insect concerns are the topic of Horticulture Day.&nbsp; Guests include Laura Jesse, Entomologist and Erika Saalau-Rojas, Plant Pathologist of the ISU Plant Disease and Insect Diagnostic Clinic and Richard Jauron of Iowa State University Extension.</p><p></p><p></p><p></p> Fri, 02 Nov 2012 17:28:38 +0000 Charity Nebbe 10191 at Downy Mildew on Horticulture Day