Plant Pathology Department


Date of this Version



Plant Disease Management Reports 7, FC034 (2013).


Copyright © 2013 The American Phytopathological Society. Used by permission.


A foliar fungicide efficacy trial was conducted at the University of Nebraska-Lincoln South Central Agricultural Laboratory near Clay Center, NE. DeKalb corn hybrid DKC 64-83, rating of “good” (6 out of 9) for gray leaf spot (GLS), “very good” (4 out of 9) for common rust (CR), and “good” (5 out of 9) for southern rust (SR), was planted on 26 Apr in 30-in. rows at a target population of 30,600 plants/A. The trial area was disked with corn as the previous year’s crop. Six foliar fungicide treatments and a non-treated control were replicated six times in a randomized complete block design. Each plot was four rows (10 ft) wide by 40 ft in length. . . . Among all treatments, the nontreated control had the lowest stay green percentage (54.5%) while Headline AMP 1.67 SC, 10 oz/A, R1 had the highest stay green percentage (66.0%). All foliar fungicides at all application timings reduced the percent lodging as compared to the non-treated control, though there were no significant differences between treatments. CRY-048, 5 fl oz/A, R1 and Headline AMP 1.67 SC, 10 fl oz/A, R1 had the highest 500-count kernel weight at 6.57 oz. There were significant differences in yield between treatments. The nontreated control was the lowest yielding treatment at 262.5 bu/A while Headline AMP 1.67 SC, 10 oz/A, R1 was the highest yielding treatment at 274.3 bu/A.