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1 April 2007 Tolerance of Meadow Foxtail (Alopecurus Pratensis) to Two Sulfonylurea Herbicides
Roger L. Sheley
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Abstract

Meadow foxtail is a rhizomatous grass widely grown for hay and pasture in wet meadows of the western United States and Canada. Two sulfonylurea herbicides, chlorsulfuron and metsulfuron-methyl, were evaluated for their effects on meadow foxtail biomass. Both herbicides were applied at four doses, 0.035, 0.070, 0.105, and 0.140 kg ai/ha, together with a control at each of two sites in October 2003. Treatments were replicated four times at each site and arranged in a randomized complete block design and sampled in July 2004 and 2005. Meadow foxtail biomass depended on site (P  =  0.001) or year (P  =  0.001), but not herbicide treatment (P  =  0.182). No biomass production losses resulted from applying up to 0.14 kg/ha of either chlorsulfuron or metsulfuron-methyl on meadow foxtail, even in relatively high-pH soils.

Nomenclature: Chlorsulfuron; metsulfuron-methyl; meadow foxtail, Alopecurus pratensis L.

Roger L. Sheley "Tolerance of Meadow Foxtail (Alopecurus Pratensis) to Two Sulfonylurea Herbicides," Weed Technology 21(2), 470-472, (1 April 2007). https://doi.org/10.1614/WT-06-063.1
Received: 29 March 2006; Accepted: 1 December 2006; Published: 1 April 2007
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