甲磺隆的应用技术及对后茬作物的安全性研究
The Application Technique of Metsulfuron methyland Safety to Succeeding Crop
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摘要: 在冬小麦 1~ 2叶期施用甲磺隆 1.8~ 2.5 g/hm2 ,可有效防除北京地区麦田常见阔叶杂草 ,优于当前常用除草剂苯磺隆 15g/hm2 春季施用的除草效果 ,安全性与春季施用苯磺隆 15g/hm2 相当。实验室降解结果表明 ,当甲磺隆初始浓度为 6.25μg/kg以下时 ,经过215d后 ,对后茬玉米安全。研究表明 ,向日葵是甲磺隆理想的生物测定试材 ,对甲磺隆的最低检出浓度达到 0.125μg/kg,其根长抑制率与除草剂浓度有高度的相关性 ,最佳的剂量 -反应模型为 y=a+b lnxAbstract: The broad-leaved weeds in winter wheat could be effectively controlled when metsulfuron methyl was applied at the rate of 1.8~2.5g/hm2 in autumn in Beijing. The efficacy was higher than that by using tribenuron at the rate of 15g/hm2 in spring. The results of degradation in laboratory showed that when the initial metsulfuron-methyl dosage was under 6.25μg/kg, the residue was not harmful to succeeding crop maize after 215 days. A simple and fast bioassay technique was developed for sulfonylurea herbicides. Sunflower was an ideal material for bioassay. The minimum detectable concentration for metsulfuron-methyl with sunflower's root length was 0.125μg/kg. The optimal dosage response model is y=a+b lnx.
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Key words:
- Sulfonylurea /
- Metsulfuron-methyl /
- B ioassay /
- Degradation
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Tom lin C. D. S. . The Pest icideM anual 11th. U K, The B rit ish Crop P ro tect ion Council, 1997: 842~844 L i Y. T. , ZimmermanW. T. , Go rmanM. K. et al. . P esticid e S cience, 1999, 55: 434~ 445 B row n H. M. . P esticid e S cience, 1990, 29: 263~ 281 姚东瑞, 宋小玲, 李庆康等. 杂草科学, 1995, (3) : 2~ 6 M ersieW. , Fo r C. L. . W eed S cience, 1985, 33: 546~ 548 Royuela R. . W eed S cience, 1990, 38: 546~ 552 Sunderland S. L. . W eed S cience, 1991, 39: 296~ 298 周卫平编译. 农药译丛, 1999, 21 (6) : 39~ 44 苏少泉, 周景恺. 杂草学报, 1990, (1) : 5~ 8 Groves K. M. , Fo ster R. K. . W eed S cience, 1985, 33: 825~ 828 -

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