Plant Pathology Department


Date of this Version



Plant Disease Management Reports 7, FC032 (2013).


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


A foliar fungicide timing 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. Five foliar fungicide treatments and a non-treated control were replicated six times in a randomized complete block design. . . . Stay green percentage ranged from 18.3% to 21.7%. Stratego YLD 4.18 SC, 4 fl oz/A, V11, exhibited the lowest percentage of lodging at 5.8%. 500-count kernel weights ranged from 6.24 oz for the non-treated control and Stratego YLD 4.18 SC, 4 fl oz, R1 to 6.35 oz for Stratego YLD 4.18 SC, 4 fl /oz A, V11. The non-treated control had a yield of 260.0 bu/A. Yields for fungicide treatments ranged from 256.5 bu/A for Stratego YLD 4.18 SC, 4 fl oz/A, V11 to 264.2 bu/A for Stratego YLD 4.18 SC, 4 fl oz/A, V6. There were no significant differences between treatments for stay green percentage, lodging percentage, 500-count kernel weight, and yield.