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Difenzoquat Effectiveness as Influenced by Time of Day at Application

Published online by Cambridge University Press:  12 June 2017

E. James Retzinger Jr.  and
John D. Nalewaja
John D. Nalewaja
Affiliation:
Dep. Agron., North Dakota State Univ., Fargo, ND 58105
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Abstract

Experiments were conducted in the field and controlled-environment chambers to determine wild oat (Avena fatua L. # AVEFA) control with difenzoquat (1,2-dimethyl-3,5-diphenyl-1H-pyrazolium) as influenced by applications at 4-h intervals during the day. Difenzoquat phytotoxicity was significantly higher in four of the six field experiments when applied at 1300 and 1700 h than at other times and was increased in the other two experiments. Difenzoquat phytotoxicity increased with temperature at treatment in the field experiments. Wild oat control was not increased by 8 h of 28 C before or after difenzoquat application compared to a constant 18 C in controlled-environment chambers. In controlled-environment chambers, wild oat control with difenzoquat was not influenced by the time of application during the day when humidity and temperature were kept constant.

Keywords

Wild oathumiditytemperatureAVEFA
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 33 , Issue 1 , January 1985 , pp. 78 - 81
Copyright
Copyright © 1985 by the Weed Science Society of America 

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References

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