Effect of diclosulam on broadleaf weeds in spring soybean fields in Northeast China
This study aimed to clarify the weeds control effect and crop safety of soil and foliar application of diclosulam on broadleaf weeds in spring soybean fields in Northeast China.Field experiments were carried out by random group test design in 2020 and 2021.The results indicated that soil application with diclosulam 84％WG at effective dosage of 25.2-76.5 g/hm2 achieved plant and fresh weight control efficacies of over 90.0％for broadleaf weeds such as Chenopodium album,Persicaria bungeana,Xanthium sibiricum,Abutilon theophrasti,and Amethystea caerulea 60 days after application.The plant and fresh weight control efficacies on Solanum nigrum were both above 87.0％.The total plant control efficacy ranged from 93.3％to 99.0％,and the total fresh weight control efficacy ranged from 94.7％to 99.4％.Foliar application with diclosulam 84％WG at effective dosage of 25.2-63.0 g/hm2 achieved plant and fresh weight control efficacies of over 93.0％for P.bungeana,X.sibiricum and A.theophrasti,and over 82.0％for A.caerulea 30 days after application.The plant control efficacy for C.album and S.nigrum ranged from 59.8％to 85.5％,and the fresh weight control efficacy ranged from 62.5％to 90.9％.The total plant control efficacy ranged from 80.1％to 93.2％,and the total fresh weight control efficacy ranged from 82.2％to 95.9％.Initially,soybean leaves were damaged by the application,and afterward,new leaves grew normally.Both soil and foliar application can effectively control broadleaf weeds in spring soybean fields in Northeast China.According to the analysis of soybean yield,there was no significant difference between the four soil applications with effective dosage of 25.2-76.5 g/hm2 of diclosulam 84％WG and manual weeding.The results provided new ideas for the selection of post seedling pesticides in soybean fields.The appropriate application dosage of foliar application is 31.5-37.8 g/hm2 of diclosulam 84％WG.The soil application has better weed control effect than the foliar application,and the appropriate application dosage is 25.2-50.4 g/hm2 of diclosulam 84％WG.
NETL
NSTL
万方数据
