Introduction

Materials and
Methods

Results and
Discussion

References

Project
Background

Trifluralin Reduces Oat Establishment and Yield But Not Quality

Frank A. Manthey, Richard K. Zollinger,
Michael S. McMullen, and Orval R. Swenson
Department of Cereal Science and Department of Plant Sciences
North Dakota State University


Abstract
Tolerance of 10 oat (Avena sativa L.) genotypes to trifluralin 4 EC (Dow Agrosciences) applied preplant incorporated (PPI) at 0.12, 0.25, and 0.37 lb ai/acre was investigated in a field experiment located at Prosper and Thompson, North Dakota in 1993 and 1994. Trifluralin reduced emergence of all oat genotypes. Oat seedling emergence decreased with increased rate of trifluralin. The reduction in oat emergence by trifluralin at 0.12 and 0.25 lb/acre was partially compensated by increased tillering and seed/panicle. Trifluralin decreased the yield of ‘Paul’, a hull-less oat, more than other genotypes. Average yield reduction from trifluralin at 0.12 lb/acre was 9%, at 0.25 lb/acre was 23%, and at 0.37 lb/acre was 46%. Trifluralin did not affect oat kernel weight, test weight, groat percentage, and lipid or protein content. This article is only available online at http://www.ag.ndsu.nodak.edu/ndagres/ndagres.htm

Impact — This research indicates that oat are injured by trifluralin residues that could occur in soil one year after application. Results of this study would be useful when planning crop rotations.
Audience — Oat producers; herbicide manufacturers and sales representatives; crop consultants.

Keywords
Genotype response; trifluralin carryover; trifluralin injury.

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Table of Contents – Summer 1998

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