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Environment and Bromoxynil Phytotoxicity

Published online by Cambridge University Press:  12 June 2017

John D. Nalewaja  and
Grzegorz Skrzypczak
John D. Nalewaja
Affiliation:
Agron. Dep., North Dakota State Univ., Fargo, ND 58105
Grzegorz Skrzypczak
Affiliation:
Akademia Rolnicza, ul. Mazowiecka 45/46, 60-623 Poznan 31, Poland
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Abstract

Experiments in controlled-environment chambers indicated that high temperature, 30 C, increased the phytotoxicity of bromoxynil (3,5-dibromo-4-hydroxybenzonitrile) to wild mustard (Sinapis arvensis L. # SINAR) and redroot pigweed (Amaranthus retroflexus L. # AMARE) compared to low temperature, 10 C, during and after treatment. Bromoxynil phytotoxicity generally was higher at relative humidities of 90 to 95% compared to 40 to 60%, but relative humidity had less influence on bromoxynil phytotoxicity than did temperature. A simulated rain immediately after bromoxynil treatment reduced control of both species, but the reduction was of no practical importance for wild mustard. The data indicate that wild mustard and redroot pigweed control would be reduced by bromoxynil application during a period of low temperatures or to plants in advanced growth stages.

Keywords

Simulated rainfallrelative humiditytemperatureSinapis arvensis L.Amaranthus retroflexus L.SINARAMARE

Information

Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 34 , Issue 1 , January 1986 , pp. 101 - 105
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

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