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- W868996903 abstract "Heavy reliance on chemical weed control linked to practies such as continuous cropping has resulted in 272 resistant biotypes of 162 species in 210,000 fields throughout the world. These resistant weeds in the past were mainly dominated by triazine resistance, but now accelerates the development of resiatance by the continuous and extensive use of new chemical classes with very high activity at specific target site such as the sulfonylurea(SU) herbicides. Most of resistant weeds to SU herbicides were selected in monoculture wheat-growing areas by chlorsulfuron in the last many yeras. However, world-wide resistant species associated with rice have been increasing rapidly. The most widespread and diverse SU-resistance problem has found in Korea and Japan, where bensulfuron and pyrazosulfuron of the SU herbicides have been used continuously as so-called one-shot formulations since 1989. Six SU resistant biotypes of Monochoria korsakowii, Monochoria vaginalis, Lindernia dubia, Scirpus juncoides, Rotala indica and Cyperus difformis as of 2002 have confirmed in paddy fields in Korea. These SU-resistant weeds have been mainly identified in Jeonnam and Chungnam provinces practicing extensively wet-seeded culture in the rice. However, farmers complaint to control effect of SU have been provoking from the others. If the present trend continues, the number of herbicides effective on certain weed species may diminish rapidly. To counteract this trend, we must develop and perform the integrated herbicide resistant management programs depends on the interaction and cooperation of governments, agrochemical companies, academia and farmers. Each of these parties has a specific role to fill and each must take responsibility to fulfill that role. Especially, governmental policies have a major impact on the implementation of effective herbicide resistance management programs. Government must construc- tively inform the seriousness by occurrence of herbicide resistant weeds, and organize a number of working groups to manage resistance like HRAC(Herbicide Resistance Action Committe) estsablished under auspices of the International Group of National Associations of Agrochemical Manufacturers. In addition, the registration of herbicides should be conducted on a sound scientific basis. Agrochemical companies should develop and supervise the excellent herbicides on the resistance. Academia like universities and research institutions must establish and inform guidelines for managing resistance. And farmers must be able to follow the programs and guidelines presented by government, agrochemical companies and academia to manage resistance." @default.
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- W868996903 date "2003-01-01" @default.
- W868996903 modified "2023-09-24" @default.
- W868996903 title "Resistance in Korea:Where Are We Now? and Where Are We Going?" @default.
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