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Postemergence Control of Giant Foxtail (Setaria faberi) in Corn (Zea mays) with Tridiphane and Triazine Combinations

Published online by Cambridge University Press:  12 June 2017

Rick A. Boydston  and
Fred W. Slife
Rick A. Boydston
Affiliation:
Dep. Agron., Univ. Illinois, Urbana, IL 61801
Fred W. Slife
Affiliation:
Dep. Agron., Univ. Illinois, Urbana, IL 61801
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Abstract

Postemergence applications of atrazine [6-chloro-N-ethyl-N′-(1-methylethyl)-1,3,5-triazine-2,4-diamine], tridiphane [2-(3,5-dichlorophenyl)-2-(2,2,2-trichloroethyl) oxirane] and atrazine, and tridiphane and cyanazine {2-[[4-chloro-6-(ethylamino)-1,3,5-triazin-2-yl] amino]-2-methylpropanenitrile} resulted in 90% or better control of giant foxtail (Setaria faberi Herrm. # SETFA) less than 2.5 cm in height. Delaying the application of tridiphane plus atrazine or atrazine alone reduced the control of giant foxtail in 1984, control of giant foxtail over 2.5 cm in height was significantly greater with a mixture of tridiphane and atrazine (0.4 and 1.7 kg ai/ha) than with atrazine alone (2.2 kg/ha) or tridiphane plus cyanazine (0.6 and 1.8 kg/ha). Two successive applications of tridiphane and atrazine combinations controlled giant foxtail 8 to 16 cm tall (four to five leaves). Cultivation following applications of tridiphane plus atrazine improved giant foxtail control but was less effective than a second application of atrazine or tridiphane plus atrazine. Giant foxtail control in greenhouse experiments was similar to control obtained in the field. Tridiphane plus atrazine controlled 70% of giant foxtail in the four- to five-leaf stage, while atrazine applied alone resulted in only 23% control, indicating a synergistic effect.

Keywords

Atrazinecyanazinegrass controlsynergismSETFA
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 35 , Issue 1 , January 1987 , pp. 103 - 108
Copyright
Copyright © 1987 by the Weed Science Society of America 

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References

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