Plant Pathology Department


Date of this Version



Plant Disease Management Reports 6, FC075 (2012).


Copyright © 2012 The American Phytopathological Society. Used by permission.


A foliar fungicide efficacy timing trial was conducted at the University of Nebraska-Lincoln West Central Research and Extension Center at North Platte, NE. NuTech corn hybrid 3A513, rating of 5 out of 9 (1=best, 9=worst) for gray leaf spot was planted on 10 May in 30 in. rows with a target population of 32,000 plants/A. The trial area was disked prior to planting with corn as the previous year’s crop. Furrows were built in season for flood irrigation. A herbicide program of Lumax (2.5 qt/A) + Atrazine (1 lb/A) + Glystar (20 oz/A) was applied on 25 Apr. 200 lb N/A, as 32-0-0, was applied pre-plant and nine gallons/A starter fertilizer, as 10-34-0, was applied at planting. . . . Gray leaf spot and common rust were observed on the 26 Aug assessment date, but at extremely low severity levels. Gray leaf spot and common rust treatment averages were at trace amounts at most. Lodging percentages ranged from 5.8% to 15.0% with the lowest lodging percentage occurring in the non-treated control. There were no statistical differences between treatments for push lodging. Grain moisture at harvest ranged from 14.1% to 14.7%. There were no statistical differences in grain moisture between treatments. Evito T, 5 fl oz/A at VT/R1 was the highest yielding treatment with 152.2 bu/A.