Native forb response to sulfometuron methyl on medusahead-invaded rangeland in Eastern Oregon Public Deposited

http://ir.library.oregonstate.edu/concern/defaults/3b5919555

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  • Medusahead [Taeniatherum caput-medusae (L.) Nevski], a non-native, winter-annual grass (Poaceae), has invaded rangelands throughout the western USA. Medusahead is an aggressive competitor that crowds out native plants and reduces forage for wildlife and livestock. Sulfometuron methyl is a sulfonylurea herbicide used to control medusahead, but its effect on non-target native forbs is largely unknown. We assessed the impact of an autumn application of sulfometuron methyl on native forbs on the sagebrush/bunchgrass steppe of eastern Oregon over 3 years. We applied 70 g a.i./ha (1.0 oz. a.i./acre) of sulfometuron methyl to randomly selected locations on three sites in a split-plot-in-time (repeated-measures) experimental design. Three years after treatment, 6 of the 11 forb species studied had a significant reduction in density (P < 0.05), with densities ranging from 3 to 60% of the pre-treatment levels. The results of this study suggest that the benefit of medusahead control by sulfometuron methyl should be weighed against the damage to non-target species.
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  • Louhaichi Mounir, Carpinelli Michael F., Richman Lesley M., Johnson Douglas E. (2012) Native forb response to sulfometuron methyl on medusahead-invaded rangeland in Eastern Oregon. The Rangeland Journal 34, 47–53.
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  • description.provenance : Submitted by Deanne Bruner (deanne.bruner@oregonstate.edu) on 2012-05-16T17:56:38Z No. of bitstreams: 1 LouhaichiMounirRangelandEcologyNativeForbResponse.pdf: 665841 bytes, checksum: f53b540be268ac57d9881b44943669d1 (MD5)
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