Combinations of pre-emergence herbicides with minimized dosages and increased efficacy were opti-mized in spring corn field in eastern Hebei Province.A field efficacy test was carried out with the soil spraying method on the conventional herbicides of corn field,such as prometryn,acetochlor,pendimethalin,atrazine,and thiencarbazone-methyl·isoxaflutole.The results showed that after 28 days of application,the plants control effect of the combination of 1 125 g/hm2 of prometryn+1 125 mL/hm2 of acetochlor on weeds was the best,which was 84.20％,followed by 1 500 mL/hm2 of pendimethalin+1 125 mL/hm2 of atrazine and 375 mL/hm2 of thiencarbazone-methyl·isoxaflutole+water consumption of 3％o GY-Tmax,the plants control effect of these two treatments were 80.80％and 80.70％,respectively.There was no significant difference in the plants control effect of among the three treatments.After 42 days of application,the plants control effect and fresh weight control effect of 1 125 g/hm2 of prometryn+1 125 mL/hm2 of acetochlor on weeds were the best,which were 91.35％and 95.88％,respectively,and the fresh weight control effect was significantly higher than that of other spraying herbicides treatments.The combination of 1 125 g/hm2 of prometryn+1125 mL/hm2 of acetochlor could be widely used as pre-emergence herbicides on weed control in spring corn field in eastern Hebei Province.
关键词
春玉米/土壤封闭除草剂/减量增效/冀东地区
Key words
Spring corn field/pre-emergence herbicides/minimized dosages and increased efficacy/eastern Hebei province
维普
万方数据