Date of this Version
Plant Disease Management Reports 8, FC185 (2013).
A foliar fungicide efficacy timing trial was conducted at the University of Nebraska-Lincoln South Central Agricultural Laboratory near Clay Center, NE to determine the potential effect of foliar fungicides and their application timing on lodging and yield after a late season hail event. Novartis corn hybrid N6800 GT with CruiserMaxx 250 seed treatment was planted on 24 May in 30 in. rows with a target population of 32,000 plants/A. Force 3G (4 oz/1,000 row ft) was applied in-furrow at planting. Lexar (3 qt/A) + Roundup UltraMax (32 fl oz/A) was applied on 5 Jun. The trial area had corn as the previous year’s crop. Eight treatments and a non-treated control were replicated five times in a randomized complete block design. . . . There were statistical differences between treatments for lodging. The nontreated control had the highest level of lodging at 14.0%. Lodging for foliar fungicide treatments ranged from 1.0% (Priaxor 4.17 SC, 4 fl oz/A, 10 d after hail event) to 12.0% (Kocide 3000 46.1 DF, 1.5 lb/A, 20 d after hail event). There were no significant differences among treatments for 500-count kernel weights as weights ranged from 5.71 oz to 5.86 oz. There were no statistical differences in grain moisture as moisture percentages at harvest ranged from 16.6% to 17.0%. There were no statistical differences between treatments for yield. The nontreated control yielded 174.3 bu/A. Yields for foliar fungicide treatments ranged from 169.6 bu/A (Priaxor 4.17 SC, 4 fl oz/A, 10 d after hail event) to 179.4 bu/A (Kocide 3000 46.1 DF, 1.5 lb/A, 20 d after hail event).