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Johnsongrass (Sorghum halepense) Control in Reduced-Tillage Systems

Published online by Cambridge University Press:  12 June 2017

Mark A. Langemeier and
William W. Witt
Mark A. Langemeier
Affiliation:
Univ. Kentucky, Lexington, KY 40546
William W. Witt
Affiliation:
Univ. Kentucky, Lexington, KY 40546
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Abstract

Fluchloralin [N-(2-chloroethyl)-2,6-dinitro-N-propyl-4-(trifluoromethyl)benzenamine], pendimethalin [N-(1-ethylpropyl)-3,4-dimethyl-2,6-dinitrobenzenamine], and trifluralin [2,6-dinitro-N,N-dipropyl-4-(trifluoromethyl)benzenamine] either alone or in combination with fluazifop {(±)-2-[4-[[5-(trifluoromethyl)-2-pyridinyl]oxy]phenoxy] propanoic acid}, haloxyfop {2-[4-[[3-chloro-5-(trifluoromethyl)-2-pyridinyl] oxy] phenoxy] propanoic acid}, or sethoxydim {2-[1-(ethoxyimino)butyl]-5-[2-(ethylthio)propyl]-3-hydroxy-2-cyclohexen-1-one} were evaluated for johnsongrass [Sorghum halepense (L.) Pers. # SORHA] control in reduced-tillage soybean [Glycine max (L.) Merr.] production systems. Data obtained in 1983 and 1984 near Lexington and Princeton, KY, indicated that johnsongrass could be effectively controlled. A single discing before application of the soil-active herbicides usually had no effect on johnsongrass control. Johnsongrass control was primarily dependent on foliarly applied herbicides. Preplant-incorporated treatments did not provide adequate johnsongrass control when used alone. Johnsongrass panicle numbers recorded in September corresponded to visual evaluations of control recorded earlier in the growing season. Soybean yield with all herbicide treatments was greater than with a nontreated control and was closely associated with the degree of johnsongrass control.

Keywords

Minimum tillagepreplant incorporatedfoliar applicationsGlycine maxSORHA

Information

Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 34 , Issue 5 , September 1986, pp. 751 - 755
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

Literatur Cited

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