李国瑜 丛新军 颜丽美 李亮 孟宪岳

摘要：为进一步验证分析84%双氯磺草胺水分散粒剂的药效，开展了对夏大豆田1年生禾本科杂草和阔叶杂草的防除效果及安全性评价研究。结果表明，大豆播后苗前喷施有效成分为35 g a.i./hm2的84%双氯磺草胺水分散粒剂7 d后，田间杂草即出现萎蔫、枯亡等现象;30 d后，对常见阔叶杂草的总防效为100%，对禾本科杂草的鲜重防效均高于90%，而株防效分别为96.30%（牛筋草）、94.16%（马唐）、85.53%（狗尾草）、84.62%（小麦自生苗）、80.95%（稗）;84%双氯磺草胺水分散粒剂对大豆的生长发育无不良影响，田间产量为4 942.0 kg/hm2，较空白清水对照、480 g/L广灭灵乳油处理增产43.58%、12.37%，具有较好的推广应用前景。

关键词：大豆;双氯磺草胺;杂草;防效;安全性;产量

中图分类号：S365  文献标志码：A  文章编号：1003-935X（2021）04-0073-05

Control Effect of Diclosulam 84% WDG on Weeds and Its Selectivity Evaluation in Summer Soybean Fields

LI Guo-yu1，CONG Xin-jun1，YAN Li-mei1，LI Liang2，MENG Xian-yue3

（1.Taian Academy of Agricultural Sciences，Taian 271000，China;2.Dongping Bureau of Agriculture and Rural，Dongping 271500，China;

3.Agricultural Comprehensive Service Center of Anzhan Town，Feicheng Country，Shandong Province，Feicheng 271603，China）

Abstract：To further verify the efficacy of diclosulam 84% WDG，we studied the control effect on annual grass weeds and broadleaf weeds and its selectivity evaluation in summer soybean fields.When diclosulam 84% WDG （35 g a.i./hm2） was sprayed at pre-emergence stage，the weeds were wilted or died 7 days later. After 30 days，the total control effect rate on common broadleaf weeds was 100%，and the control effect rate of fresh weight on grass weeds was higher than 90%，while the control effect rates of plant on Eleusine indica，Digitaria sanguinalis，Setaria viridis，Triticum aestivum and Echinochloa crusgalli were 96.30%，94.16%，85.53%，84.62% and 80.95%，respectively. It has no adverse effect on the growth and development of soybean sprayed diclosulam 84% WDG. The soybean yield of

diclosulam 84% WDG treatment was 4 942.0 kg/hm2，which was 43.58% higher than that of water treatment，and 12.37% higher than that of clomazone 480 g/L EC treatment. Diclosulam 84% WDG has good prospect of popularization and application prospects.

Key words：soybean;diclosulam;weed;control effect;selectivity

收稿日期：2021-04-30

基金項目：山东省现代农业产业技术体系杂粮创新团队专项（编号：SDAIT-15-09）;泰安市科技发展计划（编号：2018NS0086）。

作者简介：李国瑜，男，山东枣庄人，硕士，农艺师，主要从事杂粮作物的栽培与育种工作。E-mail：lgy_fish@126.com。

通信作者：丛新军，高级农艺师，主要从事杂粮作物的栽培与育种工作。E-mail：tazaliang@126.com。

大豆是我国重要的油料作物，种植面积维持在700万hm2左右[1-2]。农田杂草是影响大豆产量和品质的关键因素之一，而人工防除杂草不仅费时费力还提高了生产成本，所以化学除草剂得到广泛应用[1-4]。近年来，随着杂草抗药性以及种群稳定性的改变，原本处于弱势的农田杂草逐渐变成具有明显优势和危害性的恶性杂草。而市场上销售的除草剂品类越来越多，常因药剂选择或施药技术不当造成除草效果不佳甚至产生药害[5-7]。……