Study on Safe Dosage of Imazethapyr for an Imazethapyr Resistant Millet Variety and Its Effect on Weed Control  

抗咪唑乙烟酸谷子品种除草剂安全使用剂量及除草效果研究(英文)

作　　者：张婷[1] 师志刚[1] 陈媛[1] 夏雪岩[1] 相金英[1] 耿光涛[1] 程汝宏[1] 

机构地区：[1]国家谷子改良中心,河北省农林科学院谷子研究所,河北省杂粮研究实验室,河北石家庄050035

出　　处：《Agricultural Science & Technology》2013年第6期911-914,共4页农业科学与技术（英文版）

基　　金：Supported by Special Fund for the Industrial Technology System Construction of Modern Agriculture (CARS-07-12.5-A3);the National Support Program for Science and Technology in the "12th 5-year Plan"(2011BAD06B02-1)~~

摘　　要：[Objective] This study aimed to investigate the safe dosage of imazethapyr for an imazethapyr resistant millet variety and its effect on weed control. [Method] The Imazethapyr resistant millet ＂M1508＂ was used as the experimental material and the experiment was arranged in a split plot design with two factors： herbicide application time and herbicide dosage. Application time was taken as the main plot with six treatments： A1 （preemergence treatment）, A2 （postemergence treatment on the 3rd d）, A3 （postemergence treatment on the 6th d）, A4 （postemergence treatment on the 9th d）, A5 （postemergence treatment on the 12th d）, A6 （postemergence treatment on the 15th d）; spraying dosage（B） with nine treatments： B1 （0 ml/hm2 , taking water as control）, B2 （750 ml/hm2 ）, B3 （1 125 ml/hm2 ）, B4 （1 500 ml/hm2 ）, B5 （2 250 ml/hm2 ）, B6 （3 000 ml/hm2 ）, B7 （4 500 ml/hm2 ）, B8 （6 000 ml/hm2）, B9 （7 500 ml/hm2 ）; water was added at 675 kg/hm2 . [Result] Imazethapyr showed a good herbicidal effect, and the imazethapyr resistant new variety M1508 also had a high drug resistance; the dosage range of 750 -7 500 ml/hm2 was safe for millet; considering the weed control efficacy, the yield and weeding cost comprehensively, postemergence treatment on the 6th day at 1 500 -2 250 ml/hm2 was the best for herbicide application. [Conclusion] Matched chemical weeding techniques to imazethapyr resistant millet varieties were preliminarily identified, and the efficacy of imazethapyr on weed control and its security on millet were investigated, providing references for the application and promotion of imazethapyr resistant millet varieties.[目的]探讨抗咪唑乙烟酸谷子品种除草剂安全使用剂量及除草效果.[方法]以抗咪唑乙烟酸材料M1508为材料,采用裂区设计,进行不同喷药时期、不同喷施剂量两因素除草试验。主区为喷施时期（A）,设置6个处理：A1（播种后出苗前封地处理）、A2（出苗后3d茎叶处理）、A3（出苗后6d茎叶处理）、A4（出苗后9d茎叶处理）、A5（出苗后12d茎叶处理）、A6（出苗后15d茎叶处理）;副区为喷施剂量（B）,设置9个处理：B1（0ml/hm2,清水对照）、B2（750ml/hm2）、B3（1125ml/hm2）、B4（1500ml/hm2）、B5（2250ml/hm2）、B6（3000ml/hm2）、B7（4500ml/hm2）、B8（6000ml/hm2）、B9（7500ml/hm2）,对水675kg/hm2。[结果]咪唑乙烟酸具有较好的除草效果,抗咪唑乙烟酸谷子新品种M1508也具有良好的耐药性;750~7500ml/hm2剂量范围对抗咪唑乙烟酸谷子品种M1508安全;综合考虑杂草防效、产量、除草成本,建议最佳处理方式是,出苗后6d茎叶处理,剂量为1500~2250ml/hm2。[结论]该研究初步明确了与抗咪唑乙烟酸品种配套的化学除草技术,探讨了其对谷田杂草的除草效果及对谷子安全性的影响,以期为抗咪唑乙烟酸谷子品种的应用和推广提供参考依据。

关 键 词：IMAZETHAPYR HERBICIDE MILLET Security Efficacy 

分 类 号：S482.4[农业科学—农药学]