几种播后苗前除草剂对小麦田日本看麦娘的防除效果

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关键词：小麦田；日本看麦娘；播后苗前除草剂；防除效果；安全性中图分类号： 文献标志码：A 文章编号：1003-935X（2025）01-0024-06

Control Effects of Several Pre - Emergent Herbicides Applied after Sowing on Alopecurus japonicus in Wheat Fields

WANG Xiaolin1，ZHU Axiu²，JIA Ying³，SHI Weidong³，ZHANG Jianhua1，WU Jiawen² YAO Kebing1 ，WANG Hongchun4 ， MIAO Kang' [1. Jiangsu Hilly Area Zhenjiang Institute of Agricultural Sciences，Zhenjiang 2124Oo，China ; 2. Jiangsu Plant Protection and Quarantine Station，Nanjing 21Oo36，China; 3.Syngenta（China）Investment Co.，Ltd，Shanghai 2OO131，China; 4.Instituteof Plant Protection，Jiangsu Academy of Agricultural Sciences，Nanjing 21Oo14，China]

Abstract：We screened several pre-emergence herbicidesappliedafter sowing to assess their eficacy in controling Alopecurus japonicusand toprovidea theoreticalbasis fortheir widespread promotion.Afield experiment was conducted toevaluate thecontrol efficacy of theseherbicidesin 2O23，included flufenacet 41% SC，flufenacet·diflufenican 35% （20 SC，diflufenican ⋅ flufenacet 30% SC，flufenacet ⋅⋅ diflufenican ⋅⋅ flutamone 33% SC，pyroxasulfone 40% SC，bixlozone

36% SC，and luximax 750g/L EC.The results showed that pyroxasulfone 40% SC，cinmethylin 750g/L EC，and flufenacet ·diflufenican 35% SC had long-lasting effcts，with control efficacy remaining around 80% at 136 days after application.At28daysafter application，slightyellowing of wheat leaves wasobserved intheplots treatedwith flufenacet·diflufenican 35% SC and pyroxasulfone 40% SC，the percentage of symptomatic wheat plants was less than 10% .However，wheat resumed normal growth at 48 daysafter application.The yield measurement results indicated that the wheat yield was the highest in the plot treated with pyroxasulfone 40% SC，reaching 471.88 kg/667 m²， followed byluximax 75O g/L EC，and then flufenacet·diflufenican 35% SC.Based on the comprehensive results of control efficacy，selectivity，and wheat yield，it was recommended that pyroxasulfone 40% SC at 30 mL/667 m²，luximax 750g/L EC at 30 mL/667 m2 ，or flufenacet·diflufenican 35% SC at 95 mL/667 m² could be screened as pre - emergent herbicide applied after sowing in the hilly areas of Jiangsu Province.

Key words：wheat;Alopecurus japonicus;pre-emergent herbicide applied after sowing;control effect;selectivity

江苏省镇江市年均种植小麦面积约5.33万 hm2[1] ，杂草危害是长期以来威胁镇江市小麦安全生产的重要植保难题，其中稻茬麦田的优势种杂草为蘭草和日本看麦娘[2]。（剩余6500字）