Brown silks are present on many corn plants. As much as 40-50 percent of the crop is tasseling in west central and north central counties. Soybean growth stages range from R1-R3. Potassium and nitrogen deficiencies were reported in corn, the latter causing whitening of leaf edges or dark green foliage. Cupped leaves were common in soybean throughout Iowa.
Some beans are yellow.
Reports of Rhizoctonia and Phytophthora root rots and soybean cyst nematode were common. European corn borer problems currently are minimal in corn, with some stalk boring occurring. Scouting is underway. Armyworm treatments were applied to corn fields in west central counties. Grasshopper numbers remain high in soybean fields throughout Iowa.