Experimental Preliminary Report on Control Weeds Using Drone - Assisted Drip or Fertilizer - Mixed Application of Pyraclonil and Its Compounds in Machine Transplanting Rice Fields

MING Liang'，LI Gui'，LOU Yuanlai'，WANG Ke'，ZHOU Jinxin²，SUN Yuchen²，WANG Hongchun ¹ （1. Institute of Plant Protection，Jiangsu Academy of Agricultural Sciences，Nanjing 21Oo14，China; 2.Xinghua Modern Agriculture Development Service Center in Jiangsu Province，Xinghua 2257oo，China）

Abstract：Inorder to explore weed control technology in machine transplanting rice fields using drone-assisted drip orfertilizer-mixed applicationof pyraclonilanditscompounds，a large-scale field experiment wasconducted in Xinghua City，Jiangsu Province in 2O24.Theresults showed that7days after machine transplanting rice，control ffects basedon plant and freshweight of pyraclonil 280g/L SC at 50mL/667m² ，pyracloni ⋅ lisoproturon 420 g/L SC at

80 mL/667 m² and pyraclonil 280g/L SC at40 mL/667 m²+flufenacet 41% SC at 10 mL/667 m² using drone - assisted drip or mixed fertilizer application were over 93% onEchinochloa spp.，Leptochloa chinensis（L.） Nees.， Pontederia vaginalis Burm.f.，Ammannia muliflora Roxb.，and Cyperus diffrmis L.，and wereselectivitytorice. Once applicationofherbicideviadrone-asisteddriporfertilizer-mixedapplicationefectivelycontrolled weeds throughoutthe entiregrowth periodof machinetransplanting rice.Compared totheconventional herbicideapplication method which involved drone-assisted application of bensulfuron-methyl ⋅ pretilachlor 35% WP at 120 g/667 m² mixed with fertilizer3 days before rice transplanting，followed by manual applicationof cyhalofop-butyl 20% EC at 100 mL/667 m² + penoxsulam 25 g/L OD at 120 mL/667 m² + bentazone 480 g/L SL at 175 mL/667 m² 20 days after transplanting，thisdrone-basedapproach significantlyreduced herbicideusage，saved labor costs，and enhancedthe efficiency of herbicide application.

Keywords：drone-assisted drip;ferilizer-mixedapplication;pyraclonil;compound;weed;control effect;selectivity; mechanically transplanted rice

水稻（OryzasativaL.）机插栽培具有省工、省时、生产效率高等优势，已成为我国主推的水稻栽种方式[1-2]。但是，受机插秧水稻秧苗小、栽植株行距宽、田间干湿交替等因素影响，田间杂草发生种类多、出苗时间长、发生量大，危害严重[3-6] 。化学防除一直是机插秧稻田杂草防控的主要方式。单一类型除草剂品种长期连续使用，使稗属杂草［Echinochloa spp.]、千金子［Leptochloachinensis（L.）Nees.]、鸭舌草[PontederiavaginalisBurm.f.]、多花水苋菜（AmmanniamultifloraRoxb.）异型莎草（CyperusdifformisL.）等恶性杂草对二氯喹啉酸、五氟磺草胺、氰氟草酯、苄嘧磺隆等常规除草剂产生了明显的抗药性。此外，极端恶劣天气频发、农业劳动力贫乏、除草剂用量大且效益低等问题日益凸显，也给稻田杂草防控提出了新的挑战。为此，筛选对主要优势杂草及抗性杂草高效安全的新型除草剂并研发配套的轻简高效施药技术已成为必然趋势[7]

据报道，双唑草腈（pyraclonil）对稻田常见禾本科、莎草科和阔叶杂草防效优异，既可用于土壤封闭处理，又可用于茎叶喷雾处理[8-9]。它是原卟啉原氧化酶（PPO）抑制剂，与乙酰辅酶A羧化酶抑制剂、乙酰乳酸合酶（ALS）抑制剂、激素类（auxins）除草剂无交互抗性，是治理稻田抗药性杂草和推动稻田杂草可持续防治的有效药剂[9。目前，已登记上市的双唑草腈颗粒剂产品有单剂 2% 双唑草腈颗粒剂和复配剂 10% 苯噻酰·苄嘧隆·双唑草颗粒剂，其拌肥撒施时极易集聚于施药器具底部，造成施药不均匀，进而影响其药效和安全性。因此，筛选适宜植保无人机施用的双唑草腈单剂新剂型及复配剂新产品，可为稻田杂草治理提供产品储备。……