不同除草剂防除直播稻田杂草效果试验

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中图分类号 S451.21 文献标识码A 文章编号 1007-7731（2025）17-0076-04

DOI号 10.16377/j.cnki.issn1007-7731.2025.17.019

Controleffectsof differentherbicidesonweedsin directseedingrice fields

LIU Yukun CHENYu ZHU Lijuan SHI Yangjuan （Agriculture andRural AffairsBureau ofLu'an City，Lu’an237OOO，China）

AbstractTo screen safe and effctive herbicides for direct-seeded rice fields，4 agents including 40% bensulfuron-methyl·pretilachlorWPwere tested，witha blank controlasthereference.The treatmentsincluded： treatment 1 （ 40% bensulfuron-methyl·pretilachlor WP+25% cyhalofop-butyl EW），treatment 2（ 40% bensulfuronmethyl·pretilachlor WP + 15%pyrazosulfuron-ethyl·bispyribac-sodium OD）， treatment 3 （ 33% bensulfuron-methyl·pretilachlorOD cyhalofop-butyl EW）， treatment 4（ 33% bensulfuron-methyl·pretilachlor OD （204号 pyrazosulfuron-ethyl·bispyribac-sodium OD）， treatment 5（ 25% cyhalofop-butyl EW），and treatment 6（ 15% （2 pyrazosulfuron-ethyl·bispyribac-sodium OD）.The safety to rice and weed control eficacy in the field were evaluated. The results showed thatalltested herbicides were relativelysafe forrice growth when appliedatappropriatedoses and methods.The dominant weeds inthe direct-seeded rice fields were Leptochloa chinensis and Echinochloa crus-galli， with fewer Cyperaceaeand Broadleaf weeds.Theplantcontrolefficacyat7，14，and21days after treatmentacross all treatments ranked from highest to lowest as： treatment 1> treatment 3> treatment 2> treatment 4> treatment 5> （202 treatment6.similarly，the fresh weightcontrol eficacyat21days folowed thesamedescending order：treatment 1> treatment 3> treatment 2> treatment 4> treatment 5> treatment 6. Treatments 1-4 achieved over 97% control efficacy （byplant number） for total weedsat7and14daysafter treatment，and over 96 % control efficacy （by plant number and fresh weight）at 21 daysafter treatment （36 daysafter rice sowing）.Inconclusion，applying bensulfuron-methyl·pretilachlor for soil sealing，supplemented with cyhalofop-butyl or pyrazosulfuron-ethyl·bispyribac-sodium for postemergence treatment，efectivelycontrols weeds indirect-seeded rice fieldsand issuitable for widespreadadoption in production.

Keywords direct seeding rice; weed; combining seal and elimination; control effect

水稻是重要的粮食作物之一，其产量对保障粮食安全和稳定经济发展具有重要作用。（剩余3287字）