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Temperature Effect on Barban Phytotoxicity

Published online by Cambridge University Press:  12 June 2017

S. D. Miller ,
J. D. Nalewaja ,
A. Dobrzanski  and
J. Pudelko
S. D. Miller
Affiliation:
Dep. of Agron., North Dakota State Univ.
J. D. Nalewaja
Affiliation:
Dep. of Agron., North Dakota State Univ.
A. Dobrzanski
Affiliation:
Dep. of Agron., North Dakota State Univ.
J. Pudelko
Affiliation:
Res. Inst., Skierniewic and Coll. of Agric., Poznan, Poland
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Abstract

The phytotoxicity of barban (4-chloro-2-butynyl m-chlorocarbanilate) applied 14 days after emergence to wheat (Triticum aestivum L. ‘Waldron’) and wild oat (Avena fatua L.), at constant, fluctuating or alternating day-night temperatures was determined in controlled environmental chambers. Wheat and wild oat susceptibility to barban increased as post-treatment temperature decreased. Maximum barban selectivity for wild oat in wheat occurred with a constant 18 C or an alternating 18 C day and 10 C night post-treatment temperature. At least three days of 10 C immediately following barban application were necessary to cause wheat injury. However, two days at 29 C immediately after barban application in an otherwise 10 C post-treatment regime reduced wheat injury. Further, a night temperature lower than the day temperature after barban application increased wild oat control but did not correspondingly increase wheat injury compared to the constant temperature treatments.

Type
Research Article
Information
Weed Science , Volume 26 , Issue 2 , March 1978 , pp. 132 - 134
Copyright
Copyright © 1978 by the Weed Science Society of America 

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References

Literature Cited

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