嗪草酮与氰氟草酯混用对水直播稻田杂草防效及水稻的安全性
2021-10-27朱锦磊,张慧,杨爱国,王红春,徐蓬,王可
朱锦磊,张慧,杨爱国,王红春,徐蓬,王可



摘要:通过田间小区试验测定1%嗪草酮SC与20%氰氟草酯OD混用对水直播稻田杂草的防效及水稻的安全性,旨在为水直播稻田减药控草提供新的产品和技术。结果表明,250、300、350 mL/667 m2 1%嗪草酮SC与50 mL/667 m2 20%氰氟草酯OD桶混播后8 d喷雾处理对粳稻安全,对稗属杂草、千金子、鳢肠、鸭舌草、异型莎草及总草的株防效和鲜重防效均达88%以上,对杂草的防效优于播后15 d处理。可见,播后8 d喷施嗪草酮与氰氟草酯混用药剂,能够有效防除水直播稻田多种杂草。
关键词:嗪草酮;氰氟草酯;防效;安全性
中图分类号:S451文献标志码:A文章编号:1003-935X(2021)02-0058-06Efficacy of Oxaziclomefone Mixed with Cyhalofop-Butyl on
Weeds in Wet-Directed Seeding Rice and its Crop SelectivityZHU Jinlei1,ZHANG Hui2,YANG Aiguo3,WANG Hongchun4,XU Peng4,WANG Ke4
(1.Agricultural Sciences Institute in Jiangsu Lixiahe Area,Yangzhou 225007,China;
2.Jiangsu Agrochem Laboratory Co.,Ltd.,Changzhou 213022,China;
3.Plant Protection and Plant Quarantine Station in Jiangyan District,Taizhou 225500,China;
4.Institute of Plant Protection,Jiangsu Academy of Agricultural Sciences,Nanjing 210014,China)Abstract:To develop new products and technology for reducing herbicide doses and controlling weeds in wet-direct seeded rice,a field experiment was conducted to evaluate the efficacy and crop selectivity oxaziclomefone 1% SC and cyhalofop-butyl 20% OD. Oxaziclomefone 1% SC (250、300、350 mL/667 m2) mixed with cyhalofop-butyl 20% OD (100 mL/667 m2) applied eight days after seeding provided over 88% control of Echinochloa spp.,Leptochloa chinensis (L.) Nees.,Eclipta prostrate L.,Monochoria vaginalis (Burm.f.) C.Presl.,and Cyperus difformis L.,based on plant density and fresh biomass determinations. All the treatments were also safe for japonica rice. At equal doses,the herbicide mixtures performed better when applied at eight days after wet-direct seeding compared with spraying at 15 days after seeding.
Key words:oxaziclomefone;cyhalofop-butyl;control effects;safety
水稻水直播栽培是将水稻种子直接播种于大田的栽培方式,具有降低劳动强度、提高工作效率、节省种植成本等优点,在广东省、上海市、浙江省、江苏省、安徽省等南方稻区发展迅速,是水稻的主要种植方式之一。水直播栽培稻田土壤干湿交替管理,土表裸露面积大,导致杂草发生量大、出苗时间长,且杂草叶龄与水稻苗龄相当或大于水稻,危害严重[1]。据调查,江苏省水直播稻田常见杂草有稗属杂草、千金子、鳢肠、鸭舌草、多花水苋、异型莎草等,常年杂草发生量为100~720株/m2,是传统人工移栽稻田的10~30倍[2-3]。
目前,化学除草是控制稻田杂草的主要方法。随着单一类型除草剂的长期连续使用,稻田杂草抗药性日趋加重[4]。研究作用机制不同的除草剂对稻田杂草防效及其安全性,对稻田杂草的可持续治理具有重要意义。
嗪草酮是由日本三菱油化株式会社研制、拜耳作物科学公司开发的嗪酮类除草剂[5]。……
