【摘要】 为了明确氟噻草胺在大豆田的应用效果,2016年和2017年在河北省进行田间小区试验,研究氟噻草胺的除草效果和安全性。结果表明,在大豆播后苗前使用氟噻草胺进行土壤处理,能够有效防除禾本科杂草和部分小粒种子阔叶杂草,对铁苋菜的防效较低,对杂草的鲜重防效高于株数防效。使用氟噻草胺后,大豆生长正常,产量较空白对照有显著性增加。推荐氟噻草胺在大豆田的使用剂量为630～810 g a.i./hm~2,该剂量下药后28 d对杂草的合计鲜重防效达84.9%～92.0%,且对大豆安全。氟噻草胺的杀草谱和防效与乙草胺相近,可以作为乙草胺的替换产品在大豆田使用。更多还原

【Abstract】 To develop application technology for flufenacet in soybean fields,field plot experiments were conducted to study its herbicidal efficacy and selectivity in Hebei Province in 2016 and 2017. Flufenacet sprayed as a soil treatment in pre-emergence effectively controlled grass weeds and some small-grained broadleaf weeds;it was less effective on Acalypha australis. The biomass control effect of flufenacet was higher than that based on plant number. Soybean grew normally at flufenacet doses of up to 1 260 g/hm~2 in the growth period,and its yield increased significantly compared with the untreated check. The recommended dosage of flufenacet in soybean fields was 630～810 g/hm~2. Efficacy based on total weed at 28 days after treatment was 85%～92% at the recommended the dose. Flufenacet was selective to soybean. The herbicidal spectrum and efficacy of flufenacet was similar to those of acetochlor,and it could be used as a replacement for acetochlor in soybean fields.更多还原