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Crop Responses to Hexazinone, Imazapyr, Tebuthiuron, and Triclopyr

Published online by Cambridge University Press:  12 June 2017

C. Benjamin Coffman ,
J. Ray Frank  and
William E. Potts
C. Benjamin Coffman
Affiliation:
USDA, ARS, Beltsville, MD 20705
J. Ray Frank
Affiliation:
USDA, ARS, Frederick, MD 21702
William E. Potts
Affiliation:
UMD/USDA, Beltsville MD 20705
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Abstract

Field investigations were conducted for 2 yr to characterize the responses of wheat, kidney bean, field corn, squash, okra, potato, and banana to soil-applied hexazinone, imazapyr, tebuthiuron, and triclopyr at rates used for control of woody perennial plants. Test species were planted at seven selected intervals through the first and second years after herbicide applications to assess residual herbicide activity. Tebuthiuron treatments of 2.2 kg ai ha−1 were not tolerated by any bioassay species planted 436 d after application (DAA). Only potato was tolerant of residual hexazinone 436 DAA. All species except banana generally tolerated residual imazapyr and triclopyr by the second growing season. Indigenous plants repopulated all herbicide-treated areas, except those treated with tebuthiuron, by the third growing season. Plots treated with tebuthiuron were 90% free of indigenous plants 40 mo after herbicide application.

Keywords

Hexazinone, 3-cyclohexyl-6-(dimethylamino)-1-methyl-1,3,5-triazine-2,4(1H,3H)-dioneimazapyr, (±)-2-[4,5-dihydro-4-methyl-4-(1-methylethyl)-5-oxo-1H-imidazol-2-yl]-3-pyridinecarboxylic acidtebuthiuron, N-[5-(1,1-dimethylethyl)-1,3,4-thiadiazol-2-yl]-N,N′-dimethylureatriclopyr, [(3,5,6-trichloro-2-pyridinyl)oxy]acetic aciddwarf banana, Musa acuminata Collacorn, Zea mays L.kidney bean, Phaseolus vulgaris L.okra, Abelmoschus esculentus (L.) Moenchpotato, Solanum tuberosum L.summar squash, Cucurbita pepo L.wheat, Triticum aestivum L.Residual herbicide activity
Type
Research
Information
Weed Technology , Volume 7 , Issue 1 , March 1993 , pp. 140 - 145
Copyright
Copyright © 1993 by the Weed Science Society of America 

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References

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