Author:
Keeley Paul E.,Carter Charles H.,Thullen Robert J.,Miller John H.
Abstract
Three annual applications of glyphosate [N-(phosphonomethyl)glycine] with three ropewick applicators were compared to hoeing and cultivation for the control of johnsongrass [Sorghum halepense(L.) Pers. ♯3SORHA] in cotton (Gossypium hirsutumL. ‘Acala SJ-2′) in 1980 and 1981. The three applicators provided about equal control of johnsongrass. Averaged over treatments, years, and dates of application, plots treated with glyphosate contained 83% fewer live johnsongrass shoots (14/m2) than cultivated control plots (84/m2) 2 to 3 weeks after each application. Glyphosate-treated plots yielded an average of 81% more seed cotton (2010 kg/ha) than cultivated control plots (1110 kg/ha). However, yields of treated plots averaged 33% less than plots maintained weed-free by hoeing. Although applications of glyphosate reduced johnsongrass populations 83%, the competitive effect of johnsongrass on cotton prior to the initiation of treatments, plus the competition from escape plants between treatments, prevented cotton from yielding normally.
Publisher
Cambridge University Press (CUP)
Subject
Plant Science,Agronomy and Crop Science
Reference22 articles.
1. Application equipment for Roundup – the rope wick applicator;Dale;Proc. Beltwide Cotton Prod. Res. Conf.–Cotton Weed Sci. Res. Conf.,1979
2. Innovative methods of postemergence weed control;McWhorter;Proc. South. Weed Sci. Soc.,1980
3. Abernathy J. R. 1980. Recirculating sprayers and rope applicators. Proc. West. Cotton Prod. Conf. Pages 44–45.
4. The development and manufacture of wick rope for herbicide application;Revelle;Proc. South. Weed Sci. Soc.,1982
5. Control of johnsongrass (Sorghum halepense) and volunteer corn (Zea mays) in soybeans (Glycine max);Dale;Weed Sci.,1981
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