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由于水稻移栽方式的改变,华南地区抛秧稻田的杂草危害逐年加重,严重影响水稻的产量和品质。为此,采用大田药效试验的方法,研究10%苄嘧磺隆·异丙草胺可湿性粉剂对于华南地区抛秧早稻和晚稻田杂草的防除效果、最佳使用剂量及其安全性。结果表明:10%苄嘧磺隆·异丙草胺可湿性粉剂在水稻抛秧7 d左右进行药土法施药,推荐使用剂量101.25~112.50 g a.i./hm2,对水稻抛秧田稗草、鸭舌草、碎米莎草等常见杂草有较好的防效,具有显著的除草增产效果。
Due to the change of rice transplanting methods, the weed hazards of rice throwing in southern China have been increasing year by year, which seriously affects the yield and quality of rice. Therefore, the field efficacy test was used to study the control effects of 10% bensulfuron-methyl-isopropylamine WP on weed-throwing and late-weedy weeds in South China. The optimal dosage and safety were studied. The results showed that 10% bensulfuron and isopropylamine WP could be applied by soil and soil method about 7 days after paddy throwing. The recommended dosage was 101.25-112.50 g ai / hm2, The common weeds such as tongue grass and broken beech grass have good control effects and have significant effects of weeding and yield increasing.