Sulfonylurea resistance in Lindernia micrantha, an annual paddy weed in Japan |
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| Authors: | Itoh Wang & Ohba |
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| Institution: | Department of Environmental Biology, National Institute of Agro-Environmental Sciences, Tsukuba, Ibaraki 305-8604, Japan,;Laboratory of Weed Science, Graduate School of Agriculture, Kyoto University, Kyoto 606-8502, Japan,;Okitama Branch, Yamagata Prefectural Experiment Station, Nanyo, Yamagata 992-0472, Japan |
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| Abstract: | Resistance to sulfonylurea herbicides, including bensulfuron-methyl, pyrazosulfuron-ethyl, imazosulfuron and ethoxysulfuron, was discovered in naturally occurring populations of Lindernia micrantha D. Don in rice fields that had been treated with sulfonylurea-based herbicides for 3–7 consecutive years. The resistant biotype was approximately 80≈300 times more resistant than the susceptible one to the above four sulfonylurea herbicides. This is the second confirmed occurrence of herbicide resistance resulting from the use of sulfonylurea herbicides in Japan. Several herbicides with different modes of action, including pretilachlor, cafenstrole, bifenox, naproanilide, thiobencarb + simetryn + MCPB, MCPA-thioethyl + simetryn and cyhalofop-butyl + bentazone, effectively controlled the resistant biotype in pot trials. |
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| Keywords: | bensulfuron-methyl herbicide resistance Japan Lindernia micrantha paddy weed Scrophulariaceae sulfonylurea resistance |
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