Field experiments and glass house bioassays were conducted to determine the influence of winter wheat (Triticum aestivum L.) straw mulch on the behaviour of the herbicides imazaquin {2-[4,5-dihydro-4-methyl-4-(1-ethyl)-5-oxo-1H-imidazol-2-yl]-3-quinolinecarboxylic acid} and clomazone {2-[(2-chlorophenyl)methyl]-4,4-dimethyl-3- isoxazolidinone}, wich had been applied to pre-emergence soybean (Glycine max)in a no-till system. There was evidence that clomazone had been intecepted by the straw whilst imazaquin was leached into the soil by rain.
no-till; soybean; Glycine max