Plant Pathology Department


Date of this Version



Plant Disease Management Reports 7, FC031 (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 soybean as the previous year’s crop. Five foliar fungicide treatments and a nontreated control were replicated six times in a randomized complete block design. . . . The AUDPC calculations indicated that the fungicide treatments containing Headline 2.09 EC, in general, reduced GLS, CR, SR severity compared to other treatments. 500-count kernel weights ranged from 6.52 oz for the non-treated control to 6.63 oz for Headline 2.09 EC, 9 fl /oz A. There were no significant differences among treatments for 500-count kernel weights. Grain moisture at harvest ranged from 14.9% to 15.1%. Regalia Maxx, 8 fl oz/A, was the lowest yielding treatment at 271.3 bu/A while the nontreated control, Headline 2.09 EC, 6 fl oz/A, and Headline EC 2.09 EC, 6 fl oz + Regalia Maxx, 4 fl oz were the highest yielding treatments at 276.2 bu/A. There were no significant differences in yield among all treatments.