EN
Experiments were established on individual farmer's fields in Podlaskie province. They were performed using randomized block design in four replications. Dominant weeds were: Elymus repens, Viola arvensis, Chenopodium album, Galeopsis tetrahit, Artemisia vulgaris, Matricaria inodora. Applied herbicides limited weed infestation in varying degree. The most effective against weeds present in sorghum were Lumax 537,5 SE (regardless of the date of application) and the Boreal 58 WG (regardless of the dose), which controlled the V. arvensis, M. inodora, A. vulgaris, Rumex acetosella, G. tetrahit, Raphanus raphanistrum, Ch. album in 100%. Sensitive to Emblem 20 WG and Mustang 306 SE proved to be M. inodora, R. raphanistrum, Ch. album. Proponit 720 EC well controlled M. inodora, R. acetosella, R. raphanistrum. Guardian Max 840 EC regardless of the date of treatment was effective against V. arvensis, R. acetosella, Ch. album and A. vulgaris. M. inodora showed an average resistance to herbicides or was resistant to their action.