Effect of Sulfonylurea and Pyrazol Herbicides on the Control of Sagittaria Trifolia

Sulfonylurea계(系)와 pyrazol계(系) 제초제(除草劑)의 벗풀에 대(對)한 살초기작(殺草機作)

The experiment was conducted to investigate the cause of the continous increase of Sagittaria trifolia dominance and it's effective control methods in the paddy rice fields. Early physilogical response of S. trifolia caused by sulfonylurea three herbicides resulted in growth cessation. However, the growth-ceased plant regrew after the certain period of time. Pyrazolate{4-[2, 4-dichloro benzoyl]-1, 3-dimethylpyrazol-5-yl-ptoluene sulphonate} could control S. trifolia until 6-7 leaf stages. The herbicidal activity of S. trifolia by pyrazolate was not related to the size of tuber and the amount of carbohydrate consumption in the tuber. The production of S. trifolia tubers inhibited more than 95% by the systematic treatment of pyrazosulfuron-ethyl{Ethyl-5-(4, 6-dimethoxy pyrimidin-2-yl carbomoyl sulfamoyl)-2-chloro-2', 6'-diethyl acetanilide}, cinosulfuron and pyrazolate after the first treatment of pyrazosulfuron-ethyl and pyrazolate.

본(本) 시험(試驗)은 벗풀 우점도(優占度)의 지속적(持續的) 증가(增加) 원인인(原因)과 효과적(效果的)인 방제법(防除法)을 밝히고자 수행하였다. 1. Sulfonylurea계(系) 제초제(除草劑) 관행처리시(慣行處理時) 벗풀은 일정(一定) 기간(期間)동안 생육억제(生育柳制) 후(後) 재생(再生)되었다. 2. Pyrazolate에 의한 벗풀의 살초범위(殺草範圍)는 7엽기(葉期) 전개(展開) 이전(以前)이었다. 3. Pyrazolate에 대한 벗풀의 살초범위(殺草範圍)와 괴경(塊莖)의 크기 및 탄수화물(炭水化物) 소비량(消費量)과는 상관(相關)이 없었다. 4. Pyrazosulfuron-ethyl과 pyrazolate 일차(一次) 처리(處理) 후(後) 이들 제초제(除草劑)의 체계처리시(體系處理時) 벗풀 괴경형성(塊莖形成)이 95% 이상(以上) 억제(抑制)되었다.