Glyphosate-Resistant Russian-thistle (Salsola tragus) Identified in Montana and Washington
| Autor: | Drew J. Lyon, Prashant Jha, John F. Spring, Ian C. Burke, Vipan Kumar |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
0106 biological sciences
Salsola food.ingredient Bromoxynil 04 agricultural and veterinary sciences Plant Science Biology biology.organism_classification 01 natural sciences Clopyralid 010602 entomology chemistry.chemical_compound food Glufosinate chemistry Agronomy Glyphosate Dicamba 040103 agronomy & agriculture Thistle 0401 agriculture forestry and fisheries Agronomy and Crop Science Fluroxypyr |
| Zdroj: | Weed Technology. 31:238-251 |
| ISSN: | 1550-2740 0890-037X |
| DOI: | 10.1017/wet.2016.32 |
| Popis: | Two putative glyphosate-resistant (GR) Russian-thistle accessions were collected from fallow fields (wheat-fallow rotation): one from Choteau County, MT (MT-R), and a second from Columbia County, WA (WA-R) in summer/fall of 2015. Greenhouse and outdoor/field whole-plant dose-response studies were conducted to confirm and characterize the levels of glyphosate resistance in these GR accessions relative to known glyphosate-susceptible accessions (MT-S and WA-S from MT and WA, respectively). Based on GR50values of the progeny plants, the MT-R accession exhibited 4.5-fold and 5.9-fold resistance to glyphosate relative to the MT-S accession under greenhouse and outdoor conditions, respectively. The WA-R accession showed 3.0- to 5.0-fold resistance relative to the WA-S accession in greenhouse experiments, and 1.9- to 7.5-fold resistance in multi-site field experiments. In a separate greenhouse study on alternative POST herbicides to control GR Russian-thistle, bicyclopyrone plus bromoxynil, bromoxynil plus fluroxypyr, bromoxynil plus pyrasulfotole, bromoxynil plus MCPA, paraquat alone, paraquat plus metribuzin, saflufenacil alone, saflufenacil plus 2,4-D, and 2,4-D plus bromoxynil plus fluroxypyr provided effective control (≥95%) and shoot dry weight reduction (up to 98%) of GR accessions. This research confirms the first global case of field-evolved GR Russian-thistle. Best management practices (BMPs); including alternative, effective herbicide programs (based on multiple mechanisms of action highlighted in this study) need immediate implementation to prevent further spread of GR or evolution of multiple HR Russian-thistle populations in this region. |
| Databáze: | OpenAIRE |
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