Studies on control effects of combined application of harness and sumisoya on weeds in potato fields

Single factor randomized block design was used in order to study chemical control effect of two new kinds of high efficiency herbicides Sumisoya and Harness on weeds in potatoes fields.The results showed that after 30 days,the control effect of combining Harness with 100 mL per acre and Sumisoya with 12gram per acre could amount to 100 percent,and which had no obvious bad influence on potatoes germination.After 50 days,the effects of this treat on grass weeds or broadleaf weeds were 97.47 percent and 96.60 percent in stem effect,and 99.08 percent and 99.93 percent fresh weight effect.And this treat was safety to the growth of the potatoes.It resulted in 18.62% increased production per acre comparing with contron;The stem control effect of Harness with 100 mL per acre on grass weeds could amount to 98.48 percent after 30 days and 94.94 percent after 50 days.The fresh weight effect of this treat on grass weeds was 84.29 percent after 50 days.This treat resulted in 5.08% increased production per acre;The stem control effect of Sumisoya with 12gram per acre on broadleaf weeds could amount to 99.77 percent after 30 days and 96.31 percent after 50 days.The fresh weight effect of this treat was 98.74 percent after 50 days.This treat resulted in 8.53% increased production per acre.