In 3-years field experiment metolachlor 1728 g·ha^-1 applied next day after sowing of snap bean seeds controlled more than 90% of weeds and did not injured bean plants. Bentazon 450 g·ha^-1 + 450 g·ha^-1 applied postemergence with adjuvant controlled from 57% to 95% of weeds and caused slight chlorosis of bean leaves. Both herbicides did not influence the yields of green pods nor dry seeds. Three weeks delaying of first weeding caused a significant decrease of these yields but it did not affect the breadth of green pods nor the weight of 1000 dry bean seeds.

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