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ARS Home » Midwest Area » Morris, Minnesota » Soil Management Research » Research » Publications at this Location » Publication #84994
Title: EFFECTS OF TIME POSTEMERGENCE APPLICATION OF NICOSULFURON ON TOLERANCE OF SEVEN CORN HYBRIDS AT LAMBERTON, MN IN 1996

Author
item LUESCHEN, WILLIAM - UNIVERSITY OF MINNESOTA
item Westgate, Mark
item GETTING, JODIE - UNIVERSITY OF MINNESOTA

Submitted to: University of Minnesota Special Publication
Publication Type: Abstract Only
Publication Acceptance Date: 8/27/1997
Publication Date: N/A
Citation: N/A

Interpretive Summary:

Technical Abstract: The objective of this study was to evaluate the effects of postemergence application of nicosulfuron at 4-inch, 10-inch, and 20-inch growth stages on corn injury and yield. A randomized complete block design with a split plot arrangement of treatments with four replications and a plot size of 10x30 ft. was used. The main plots were seven corn hybrids (ranging in maturity from 80-110 day relative maturity.) Subplots were nontreated check and the three application timings of nicosulfuron. Nicosulfuron was applied at 0.031 lb/A with crop oil concentrate (Class Additive 17% from Cenex Land O'Lakes) at 1% v/v and 28% N solution at 2.5% v/v. None of the hybrids exhibited stunting, leaf crinkling or chlorosis, when nicosulfuron was applied at the 4 in. stage. Very mild injury observed at the 10 in. stage disappeared within 16 days after treatment (DAT). Injury to 3963 and 3917 sprayed at the 20-in. stage was not detected 34 DAT. None of the treatments affected tasseling pollen shed or silking dates. Grain yield was not affected at the 4-in. stage. When applied to corn 13-15 inches tall, nicosulfuron reduced grain yield of 3963. Nicosulfuron applied to corn 18.5 to 21 inches tall reduced grain yield of 3963, 3917, 3563, and 3547. Therefore, response of corn hybrids to nicosulfuron needs to be considered when applications are made when corn exceeds 4 inches tall. Grain moisture generally was not affected by nicosulfuron applied at any stage of corn development.