Author:
Chism William J.,Birch Jeffrey B.,Bingham S. Wayne
Abstract
Control of southern crabgrass by quinclorac was influenced by plant growth stage. A three-parameter nonlinear regression was used to describe the influence of quinclorac concentration on each growth stage and to compare growth stages. A SAS® program for these comparisons is described. Pseudo R2values for fit were above 0.98 for all tests. Flowering crabgrass plants had the highest GR50value (50% growth reduction on a dry weight basis) whereas preemergence, three- to five-true-leaf, and two- to four-tiller stages were lower.
Publisher
Cambridge University Press (CUP)
Subject
Plant Science,Agronomy and Crop Science
Reference17 articles.
1. Quinmerac–studies to investigate selectivity in wheat;Berghaus;Proc. Br. Crop Prot. Conf.–Weeds,1989
2. Postemergence control of large crabgrass (Digitaria sanguinalis) with herbicides;Chism;Weed Sci.,1991
3. Absorption, translocation, and activity of fluazifop-butyl as influenced by plant growth stage and environment;Kells;Weed Sci.,1984
4. Letters following this symbol are a WSSA-approved computer code from Composite List of Weeds, Revised 1989. Available from WSSA, 309 W. Clark St., Champaign, IL 61820.