Korean Journal of Weed Science (한국잡초학회지)
- Volume 17 Issue 4
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- Pages.362-367
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- 1997
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- 0253-7648(pISSN)
An Optimum Control Time of Alopecurus aequalis var. amurensis Ohwi in No - tillage Dry Seeded Rice
벼 무경운(無耕耘) 건답직파재배시(乾畓直播栽培時) 둑새풀 방제적기(防除適期) 구명(究明)
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Hwang, C.D.
(National Yeongnam Agriculture Experiment Station, RDA.) ;
- Park, S.T. (National Yeongnam Agriculture Experiment Station, RDA.) ;
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Kim, S.Y.
(National Yeongnam Agriculture Experiment Station, RDA.) ;
- Lee, K.Y. (National Yeongnam Agriculture Experiment Station, RDA.) ;
- Kim, S.C. (National Yeongnam Agriculture Experiment Station, RDA.)
- Received : 1997.10.29
- Published : 1997.12.30
Abstract
A field experiment was conducted to determine an optimum control time of water foxtail(Alopecurus aequalis var. amurensis Ohwi), a most troublesome weed, in no-tillage dry seeded rice. Paraquat, a non-selective herbicide, was applied at 1.5 days interval from March 15 to May 15 at a concentration of 3,000ml per hectar and its control efficacy to A. aequalis was recorded before and after seed sowing. In addition. other characters such as decayed injury of A. aequalis to rice seedling, and its influence of seedling stand were also investigated in relation to rice grain yield. Dry weight of A. aequalis was rapidly increased with delay in control time from 42g/
벼 무경운(無耕耘) 건답직파재배시(乾畓直播栽培時) 둑새풀 방제적기(防除適期) 구명(究明)하기 위해 '96년(年) 3월(月) 15일(日)부터 5월(月) 15일(日)까지 15일(日) 간격(間隔)으로 5회(回) 비선택성(非選擇性) 제초제(除草劑)인 Paraquat dichloridc를 ha당(當) 3000ml를 살포(撒布)하여 시험(試驗)한 결과(結果)를 요약(要約)하면 다음과 같다. 1. 둑새풀 방제시(防除時) 둑새풀 발생량(發生量)은 42-237g/