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Soft Red Winter Wheat (Triticum aestivum) Cultivar Response to Metribuzin

Published online by Cambridge University Press:  12 June 2017

Jill Schroeder ,
Philip A. Banks  and
Robert L. Nichols
Jill Schroeder
Affiliation:
Agron. Dep., Univ. of Georgia, Athens, GA 30602
Philip A. Banks
Affiliation:
Agron. Dep., Univ. of Georgia, Athens, GA 30602
Robert L. Nichols
Affiliation:
USDA-ARS, Coastal Plain Exp. Stn., Tifton, GA 31793
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Abstract

Greenhouse and field experiments, at two locations in Georgia, evaluated the tolerance of several soft red winter wheat cultivars (Triticum aestivum L.) to postemergence applications of metribuzin [4-amino-6-(1,1-dimethylethyl)-3-(methylthio)-1,2,4-triazin-5(4H)-one]. In the greenhouse, none of the cultivars growing in pots tolerated a 0.6 kg ai/ha treatment of metribuzin applied at the two-to three-tiller, six- to nine-tiller, or early-stem elongation growth stages. In nutrient culture, ‘McNair 1003’ was more tolerant to a 0.15 μg/ml concentration of metribuzin than other cultivars. Significant injury and yield reductions of wheat cultivars treated in the field with 0.6 and 1.1 kg/ha of metribuzin occurred. Differences between the cultivars were not uniform over all experiments. Increased injury was accompanied by higher rainfall and low temperatures subsequent to application. None of the wheat cultivars evaluated in the field experiments was injured by the 0.3 kg/ha rate of metribuzin. Acceptable selective weed control was obtained with this rate, indicating that metribuzin could be used in these soft red winter wheat cultivars.

Keywords

Crop injuryherbicide toleranceas-triazine
Type
Weed Control and Herbicide Technology
Information
Weed Science , Volume 34 , Issue 1 , January 1986 , pp. 66 - 69
Copyright
Copyright © 1986 by the Weed Science Society of America 

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References

Literature Cited

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