Abstract:

The study aims to determine the safety of herbicide 800 g/L prosulfocarb EC for crops, its control effect on broad-leaved weeds and the appropriate dosage. ‘Green Broad Bean 14’was selected as the test material, the soil before seedling was sprayed with 800 g/L prosulfocarb EC at the concentration of 2040, 3960 and 7920 g/hm², and 960 g/L S-metolachlor EC was used as the control agent at the concentration of 1080 g/hm². The control effects of prosulfocarb EC and S-metolachlor EC were determined. The results showed that when the effective amount of 800 g/L prosulfocarb EC was 2040-7920 g/hm², the control effect on the annual broad-leaved weeds in broad bean field in Qinghai Province was 86.99%-89.00%, and the control effect on fresh weight was 85.10%-89.29%. After sowing broad bean, spraying 800 g/L prosulfocarb EC at different doses before seedling period could increase the yield of broad bean by more than 5.93% in different treatment areas. This herbicide has significant control effect on annual broad-leaved weeds in broad bean field and safe for crops.

Key words: 800 g/L prosulfocarb EC, broad bean field, annual weeds, control effect