280 g/L 双唑草腈悬浮剂对机插稻田的杂草防效及其安全性评价

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中图分类号：S482.4;S451.2 文献标志码：A 文章编号：1003-935X（2025）01-0064-07

Control Efficacy of Pyraclonil 280g/L SC on Weeds and Its Selectivity to Rice in Mechanie Transplanting Rice Fields

XIA Huaxing1，LIU Weixin1，XIE Hongfang²，YUAN Dengrong²，ZHANG Nannan³，ZHU Axiu4 WU Jiawen4，TANG Qingwei1

（1.Plant Protection and Quarantine Station of Gaochun District，Nanjing City，Nanjing2113Oo，China; 2.Nanjing Plant Protection and Quarantine Station，Nanjing 21Ooo8，China; 3.Jiangsu Pesticide Research InstituteCo.，Ltd.，Nanjing21OO18，China； 4.Jiangsu Plant Protection and Quarantine Station，Nanjing 210036）

Abstract：To evaluate pyraclonil 28O g/LSC on weeds and its selectivityto rice in mechanical transplanted ricefields， afieldtrial was conductedduring 2O24inGaochun District，NanjingCity，Jiangsu Province，screeningseveral herbicides including pyraclonil 280g/L SC，oxaziclomefone 10% SC + bensulfuron-methyl ⋅⋅ mefenacet 53% WP，mefenacet·bensulfuron-methyl ⋅ benzobicyclon 63% WDG，and pretilachlor 500g/L EC + oxadiargyl 38% OD.The results showed that the control eficacy of pyraclonil 280g/L SC with 900mL/hm2 was significant in controlling Gramineae weedsand broad-leaved weedsinmechanical transplantedricefields.Plant control eficacy basedon total weeds reached 100% at 30 days after application，while plant and fresh weight control efficacies based on weeds were 93. 20% （204号 and 99.68% at 60 days after application，respectively. In terms of selectivity to rice，burn spots appeared on the leaves of somerice seedlingsat3days after application，but recovery began at7daysafter applicationandnormalized at15 days afterapplication.Moreover，there wasnosignificantimpact onrice tilering or yield.Byapplying pyraclonil （2 280g/L SC at 900mL/hm2 5 to 7 days after machine - transplanting，effective one- time weed control could be achieved at the pre -emergent stage in transplanted rice fields while maintaining high yields.

Key words ： pyraclonil 280g/L SC; mechanical transplanted rice fields;weed;control eficacy;selectivity

水稻为禾本科稻属植物，是我国重要的粮食作物。（剩余8361字）