Aiming to study the effects of selective herbicides to the control at late post -emergence and in beans crop, during the winter season of 1683, in a region wher e the soil was previou sly under cerrado vegetation a field experiment was carried out at the Experiment al Farm of UNESP - Campus of the Ilha Solteira . The following treatments we re tested: DPX-Y6202 [2- [4- [(6-chloro - 2 - quinoxalinyl)-oxy ]-phenoxy ]- propionic acid , et hylester ] at 70 an d 140 g/ ha with and without Assist added in quantities of 1,5 1/ha, sethoxydim at 276 and bentazon at 960 g were also added with 1,5 1/ha of Assist and controls with and without hoeing. The experimental design used wasr and omized blocks with 8 treatments and 4 replications. At the applications the prevailing weeds were Digitaria ciliaris (Retz) Koel (Crabgrass), all shooted; representing 85% of the population, of number / m2, and Amaranthus sp representing 8% with 15 to 20 cm height and the beans crop was at flowering stage. The results showed that the herbicides caused very light phytotoxicity on the crop. Th e DPX-Y6 20 2 ands ethoxyd im presented excellent control of crab grass and bentazon controled only 55,4% of the Amaranthus sp. Never thelless, the total weed control were reduced substancially and bentazon was in effective. The herbicides did not affect the growth on the yield of beans. The weed competition reduced the yield crop in 29%.
Phaseolus vulgaris L.; post-emergence herbicides; Digitaria ciliaris (Retz) Koel; Amaranthus sp.; selectivity