Korean Journal of Weed Science (한국잡초학회지)

The Korean Society of Weed Science & The Turfgrass Society of Korea Archive (한국잡초학회 & 한국잔디학회)
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Weed Control of Small flatsedge (Cyperus difformis L.) with Resistant Response to Sulfonylurea Herbicides in the Paddy of Korea

논에서 Sulfonylurea계 제초제에 대한 저항성 알방동사니의 방제

Im, Il-Bin;Kim, Sun;Kim, Jong-Gook;Na, Seung-Yong
임일빈;김선;김종국;나승용

  • Published : 20030000
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Abstract

This study was conducted to determine the effective herbicides and control methods of sulfonylurea resistant Cyperus difformis L. in the paddy. The resistant tests of sulfonylurea herbicides confirmed in greenhouse including azimsulfuron (15g a.i. $ha^{-1}$), bensulfuron-methyl (51g a.i. $ha^{-1}$), pyrazosulfuron-ethyl (21g a.i. $ha^{-1}$), imazosulfuron (75g a.i. $ha^{-1}$), cinosulfuron (24g a.i. $ha^{-1}$), ethoxysulfuron (21g a.i. $ha^{-1}$), halosulfuron-methyl (54g a.i. $ha^{-1}$), cyclosulfamuron (60g a.i. $ha^{-1}$) and LGC-42153 (21g a.i. $ha^{-1}$). All the sulfonylurea herbicides controlled completely from 1.5 leaves to 2.5 leaves of susceptible biotype of Cyperus difformis L. at the recommended dosage, but the resistant biotype survived at the same leaves stage. Non-sulfonylurea herbicides, such as oxadiazon (480g a.i. $ha^{-1}$), butachlor (1320g a.i. $ha^{-1}$), pretilachlor (560g a.i. $ha^{-1}$) and fentrazamide (950g a.i. $ha^{-1}$) applied at 1.5 leaves stage, butachlor, pretilachlor, thiobencarb, esprocarb, mefenacet, fentrazamide, indanofan, pyrazolate applied at 1.5 and 2.5 leaves stage and thiobencarb, esprocarb, mefenacet and pyrazolate applied at 4 leaves stage had excellent controlling effects on the resistant and susceptible biotype. But the application of the same times of molinate, dimepiperate, pyriminobac-methyl and cyhalofop-butyl had very low controlling effects on all two biotype. The foliar application of only bentazone (1600g a.i. $ha^{-1}$) or the mixtures of bentazone and 2, 4-D (1200+140 and 200g a.i. $ha^{-1}$) controlled effectively the resistant biotype of Cyperus difformis L. survived at 36 days growth stage.

Keywords

References

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