Abstract

Info

Title:: Effects of Different Mitigation Treatments on the Phytotoxicity of Fomesafen in Soybean

Author(s):: ?WANG Heng-liang; GE Yu-hong; SU Wang-cang; LU Chuan-tao; WU Ren-hai; GAO Xin-ju; ZHANG Yong-chao; ?(Institute of Plant Protection,Henan Academy of Agricultural Sciences/Henan Key Laboratory of Crop Pest Control,Zhengzhou 450002,China)

Abstract:: ?In order to study the phytotoxicity of fomesafen on soybean and the mitigation effects of different antidotes on the phytotoxicity,eight antidotes were sprayed respectively at two periods after spraying fomesafen in soybean field,and then the plant height,above ground fresh weight,chlorophyll content,pods per plant and seed yield were surveyed at certain growth period.Results showed high doses of fomesafen had obvious phytotoxicity on soybean,the plant height,above ground fresh weight,chlorophyll content,pods per plant and seed yield reduced by 16.89%,49.39%,43.75%,30.0% and 14.24%,respectively.Spraying N-P₂O₅-K₂O,1-naphthlcetic acid,gibberellic acid,KH₂PO₄ at the early stage of phytotoxicity or spraying N-P₂O₅-K₂O,poly glutamic acid enzyme,brassinolide,amino acid at the latter stage of phytotoxicity separately had better mitigation effects on the inhibition of the phytotoxicity of fomesafen on soybean seed yield.Spraying 1-naphthlcetic acid or KH₂PO₄at the early stage of phytotoxicity was more advantageous to the growth and development of soybean and their seed yield increased by 36.22% and 29.88% compared to no fomesafen control,respectively,so they could be selected as antidotes for the phytotoxicity of fomesafen.