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Open AccessArticle

Bastard Cabbage (Rapistrum rugosum L.) Resistance to Tribenuron-Methyl and Iodosulfuron-Methyl-Sodium in Spain and Alternative Herbicides for Its Control

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Department of Plant Health, Weed Laboratory, Centro de Investigación y Tecnología Agroalimentaria de Aragón-Instituto Agroalimentario de Aragón-IA2 (CITA-Universidad de Zaragoza), Avda Montañana 930, ES 50059 Zaragoza, Spain
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Department of Plant Health, Integrated Management Group, Centro de Investigación y Tecnología Agroalimentaria de Aragón (CITA), Avda Montañana 930, ES 50059 Zaragoza, Spain
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Escuela Politécnica Superior, Universidad de Zaragoza-Instituto Agroalimentario de Aragón-IA2 (CITA-Universidad de Zaragoza), Ctra. de Cuarte km 67, ES 22071 Huesca, Spain
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Nanobiotechnology for Diagnostics Group (Nb4D), Department of Chemical and Biomolecular Nanotechnology, Institute for Advanced Chemistry of Catalonia (IQAC) of the Spanish Council for Scientific Research (CSIC), Jordi Girona 18-26, ES 08034 Barcelona, Spain
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CIBER de Bioingeniería, Biomateriales y Nanomedicina (CIBER-BBN), Jordi Girona 18-26, ES 08034 Barcelona, Spain
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Author to whom correspondence should be addressed.
Agronomy 2019, 9(9), 492; https://doi.org/10.3390/agronomy9090492
Received: 10 June 2019 / Revised: 20 August 2019 / Accepted: 26 August 2019 / Published: 28 August 2019
(This article belongs to the Special Issue Weed Management & New Approaches)
Complaints about the lack of control of Rapistrum rugosum with tribenuron-methyl and iodosulfuron-methyl-sodium in winter cereals in Northeastern Spain motivated this study. During 2015–2018, greenhouse trials were conducted to test the responses of two possibly resistant (R1 and R2) and two susceptible populations to both active ingredients to determine the response of these populations to alternative herbicides. In the first trial that was repeated twice, populations were treated with both active ingredients (three rates, six replicates), and the lack of control confirmed resistance both times. The second trial was conducted on the self-pollinated progeny of the initial populations (13 rates, 6 replicates) to confirm the heritable character of resistance and to determine the resistance factors related to survival and biomass. Resistance factors based on biomass were 188 and 253 for tribenuron-methyl and 42 and 26 for iodosulfuron-methyl-sodium for R1 and R2, respectively, confirming the strong resistance of the progeny. In the third trial, nine active ingredients (a.i.) registered for broadleaved weed control in winter cereals were tested on the four populations (two rates, four replicates). All the alternative herbicides, except florasulam, results in important phytotoxicity to all tested populations, with 100% efficacy for several a.i. This work is the first report of R. rugosum that is resistant to iodosulfuron-methyl-sodium and the first report in Europe of R. rugosum that is resistant to tribenuron-methyl. View Full-Text
Keywords: ALS inhibitors; weed management; chemical control; cereals; dose-response ALS inhibitors; weed management; chemical control; cereals; dose-response
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Pardo, G.; Marí, A.I.; Aibar, J.; Vilaplana, L.; Cirujeda, A. Bastard Cabbage (Rapistrum rugosum L.) Resistance to Tribenuron-Methyl and Iodosulfuron-Methyl-Sodium in Spain and Alternative Herbicides for Its Control. Agronomy 2019, 9, 492.

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