Investigation of Weed Community in Soybean Field and Screening of Highly Effective Herbicides
YANG Ruosheng
LI Jiuying
XUE Fei
SUN Lanlan
SU Wangcang
XU Hongle
WU Renhai
Abstract：To clarify the occurrence of malignant weeds in soybean fields in Henan Province and identify herbicides for controlling harmful broadleaf weeds therein,field surveys were carried out to statistically analyze the weed community in 19 major soybean-producing regions of Henan Province,and laboratory bioassays were performed to evaluate the activity of 11 soil treatment herbicides and 14 foliar treatment herbicides against the malignant weeds in soybean fields,including C.melo,C.argentea,C.communis,and A.retroflexus.The results of weed community survey showed that 8 weed species,including D.sanguinalis,A.australis,T.aestivum,A.retroflexus,E.indica,C.melo,P.oleracea,and E.crus-galli,had a relative abundance of over 20%in soybean fields,while the relative abundance of A.theophrasti,E.prostrata,C.argentea,V.radiata,S.viridis,and C.ficifolium ranged from 3%to 20%.The results of laboratory bioassays indicated that the soil treatment herbicides metribuzin,prometryn,pyroxasulfone,and foliar treatment herbicides such as glufosinate-ammonium,lactofen,fluoroglycofen-ethyl,and MCPA-Na had high efficacy against C.melo.The soil treatment herbicides metribuzin,prometryn,oxyfluorfen,pyroxasulfone,flumioxazin,and s-metolachlor,along with foliar treatment herbicides such as fomesafen,bentazone,glyphosate,imazamox,glufosinate-ammonium,and imazethapyr exhibited high efficacy against C.argentea.For C.communis,only acetochlor with different application amounts showed higher efficacy and fluroxypyr had high control efficacy on it among foliar treatment herbicides.The soil treatment herbicides acetochlor,flufenacet-methyl,metribuzin,and pyroxasulfone,along with foliar treatment herbicides such as MCPA-Na,imazethapyr,and lactofen showed high efficacy against A.retroflexus.In conclusion,eight weeds species including D.sanguinalis,A.australis,A.retroflexus,and C.melo were the dominant noxious weeds in soybean fields of Henan Province.Metribuzin had the best pre-emergence control effect on C.melo and C.argentea,while acetochlor exhibited the best pre-emergence control effect against C.communis and A.retroflexus.The most effective foliar herbicides for C.melo,C.argentea,C.communis,and A.retroflexus were glufosinate-ammonium,fomesafen,fluroxypyr,and MCPA-Na,respectively.
Keywords：SoybeanWeedHigh efficiencyHerbicideScreening
Publication Date：2025-12-15
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：11( 110-120 )