Effects of three pre-emergence herbicides on weed control in Atractylodes lancea and their safety evaluation
This study aimed to screen pre-emergence herbicides with good control effect,low residue,and less environmental impact in Atractylodes lancea field.Three pre-emergence herbicides including acetochlor 50％EC,oxyfluorfen 24％EC,and pendimethalin 33％EC were selected and used after sowing of A.lancea in field experiment.Their efficiency of weed control and effects on chlorophyll fluorescence parameters of A.lancea were investigated,meanwhile,pesticide residues and effects on soil microbial communities were also determined.The results showed that acetochlor had the better effect for weed control,with the plant control efficacy and fresh weight control efficacy of more than 80％.It had less effect on chlorophyll fluorescence parameters of A.lancea,less pesticide residues,and no significant effect on soil bacteria and fungal communities.Oxyfluorfen and pendimethalin had impact on chlorophyll fluorescence parameters,and there were certain soil pesticide residues in short time.In contrast,the safety and stability of acetochlor are higher than those of the other two herbicides.Acetochlor can be used for pre-emergence herbicide in A.lancea due to its control effect,low residue,and less environmental impact.
NETL
NSTL
万方数据
