CAJ | 학술논문

采用倒置九点取样法对四川省烟田空心莲子草的发生及危害进行调查，并通过小区试验考察氯氟吡氧乙酸、百草枯、草铵膦3种除草剂对空心莲子草的防效。结果显示，空心莲子草在四川烟田的发生频率、相对多度和草害综合指数分别达到43．82％、9．96％和4．83％。20％氯氟吡氧乙酸乳油对空心莲子草的防除效果最佳，900、1050 mL／hm2处理26 d 对空心莲子草的株鲜质量防效分别达到94．56％、95．97％，且持效性较好。安全性试验结果表明，烟草对氯氟吡氧乙酸敏感，施药时应注意避免将药液喷施到烟草茎叶上。
채용도치구점취양법대사천성연전공심련자초적발생급위해진행조사，병통과소구시험고찰록불필양을산、백초고、초안련3충제초제대공심련자초적방효。결과현시，공심련자초재사천연전적발생빈솔、상대다도화초해종합지수분별체도43．82％、9．96％화4．83％。20％록불필양을산유유대공심련자초적방제효과최가，900、1050 mL／hm2처리26 d 대공심련자초적주선질량방효분별체도94．56％、95．97％，차지효성교호。안전성시험결과표명，연초대록불필양을산민감，시약시응주의피면장약액분시도연초경협상。
The occurrence and damage of Alternanthera philoxeroides in tobacco fields of Sichuan Province were surveyed by using an inverted “W”9 -point sampling method.Additionally.field experiments were conducted to evaluate the effi-cacy of fluroxypyr,paraquat and glufosinate to control A.philoxeroides.Frequency,relative abundance and the level of weed infestation of A.philoxeroides were 43.82%,9.96% and 4.83% in tobacco fields of Sichuan Province,respective-ly.Fluroxypyr 20% EC applied for 26 days,at 900 and 1 050 mL/hm2 effectively controlled A.philoxeroides at levels of 94% and 95% with a long -lasting persistence.Tobacco was sensitive to fluroxypyr in selectivity experiments thus spra-ying liquid onto leaves and stems of tobacco should be avoided.