15%乙氧磺隆水分散粒剂对水稻直播田杂草的防效试验

孟庆宝

摘 要：为了明确15%乙氧磺隆水分散粒剂（稻秀）对水稻直播田杂草的防除效果和适宜剂量，特开展了防效试验。结果表明，15%乙氧磺隆水分散粒剂在水稻4叶期后、杂草2～4叶期茎叶喷雾法施药，对鸭舌草、三棱草、飘拂草、水莎草等杂草具有显著的防除效果，且对水稻安全，是一种较好的防除水稻直播田杂草的除草剂。

关键词：15%乙氧磺隆水分散粒剂;水稻直播田;防效;用药剂量;抗性杂草

中图分类号 S435文献标识码 A文章编号 1007-7731（2020）14-0100-03

Abstract：In order to ascertain the control effect and suitable dosage of 15% ethoxysulfuron-methyl water dispersible granule on weeds in direct seeding rice field， and to provide scientific basis for its popularization and application， the efficacy and safety of 15% ethoxysulfuron water dispersible granule against weeds in direct seeding rice field were studied. The results showed that the application of 15% ethoxysulfuron-methyl water dispersible granule after 4-leaf stage of rice and after 2-4-leaf stage of weeds of rice was safe to rice， and had significant control effect on weeds It is a good herbicide for controlling weeds in direct seeding field of rice， because it is safe for rice and has significant control effect on weeds such as duck tongue grass， rhizoma sparganii weed fluttering grass and juncellus serotinus.

Key words： 15% ethoxysulfuron water dispersible granule; Rice direct seeding field; Control effect; Dose of medication; Resistant weeds

近年來，以移栽、抛秧为主的一些水稻种植区正在向水直播方向发展，直播耕作模式一方面可以省工省力，另一方面可以节本增收。但与此同时，水稻直播田的杂草发生也越发严重[1-4]。因此，如何选用防除效果更好、更加环保的除草剂，已成为一个迫切需要解决的问题。浙江天丰生物科学有限公司新开发的15%乙氧磺隆水分散粒剂（稻秀），具有无粉尘、易施用、成本低、防效佳的特点。为明确浙江天丰生物科学有限公司15%乙氧磺隆（稻秀）水分散粒剂对直播水稻田杂草的防除效果和适宜用量，笔者于2019年开展了防效试验，以期为该药剂的推广应用提供科学依据。

1 材料与方法

1.1 试验作物和防除对象 供试作物为水稻，采用直播方式栽培。试验田间优势种杂草有鸭舌草、飘拂草、水莎草、三棱草、千金子等，其中飘拂草和水莎草密度较高，田间草相分布均匀。

1.2 试验点基本情况 试验在安徽、广西直播稻田进行。安徽试验点设在合肥市肥东县，供试水稻品种为两优6206。……