Test on Control Effect of 40% Emulsifiable Concentrate of Prometryne and Acetochlor on Soybean Weeds

The control effect of 40% Emulsifiable concentrate of prometryne and acetochlor of soil sprayed on soybean weeds was tested with the experimental method of small plots. The results showed that it had a good control effect on monocotyledon and dicotyledon of weeds. The total control effect on weed was 82.21%～88.34% in 45days and the inhibition effect on weed fresh weight was 80.29%～88.21%. The control effect increased with the increase of the quantity of the chemical, but the best control effect was (400 g/667m~2), which had no negative effect on soybean sprouting and growth. The yield increased in all treatments and its increase rate was 10.85%～14.55%.