牛筋草对草甘膦敏感性测定

[目的]测定我国牛筋草种群对草甘膦的敏感性基线,同时监测了多年使用草甘膦的牛筋草种群的抗性情况。[方法]通过室内整株生测方法确定12个未使用草甘膦的牛筋草种群和9个使用过草甘膦的牛筋草种群对草甘膦的ED50值。[结果]未使用过草甘膦的牛筋草对草甘膦的敏感性基线为(312.15±40.94)g a.i./hm2,多年使用草甘膦的9个牛筋草种群ED50平均值为(301.65±70.75)g a.i./hm2。[结论]试验结果表明在北京、山东和广西等地多年使用草甘膦后,牛筋草种群对该药没有产生抗性。

The Sensitivity of Eleusine indica to Glyphosate

[Aims] The sensitivity baseline of weed species Eleusine indica and its resistant status to glyphosate were determined in this study.[Methods] Twelve populations from glyphoste-untreated locations were collected and nine populations from glyphosate-treated locations.Their ED50 values were determined by whole plant bioassay method in greenhouse.[Results] The findings from this study showed that the sensitivity baseline was ED50(312.15±40.94) g a.i./ha.The average ED50 value was(301.65±70.75) g a.i./ha among nine biotypes treated with glyphosate for more than five years.[Conclusions] This result indicated that E.indica was not resistant on glyphosate in Beijng,Shangdong and Guangxi where the herbicide was used for several years.