Goss’s Wilt and Northern Corn Leaf Blight Showing Up in Iowa
This past week I have received several more reports of Goss’s wilt. Reports of the disease come from south of Highway 3, North of I-80 and east of I-35. For the most part, it seems that the disease is occurring in random fields; however this past week I visited a 200 acre field in Boone County in which many of the plants were infected. Many of the plants had extensive leaf blight occurring on the top two to three leaves of the canopy (Figure 1). Most of the lesions occurred around holes made by hail.