Noteworthy, DSIL AB0.2 exhibited the highest biological activity of all studied systems, and its application resulted in an 85% reduction in fresh weight of the test plants compared to the control. This result, indicating the possibility of effective control of common lambsquarters growth in the crop, was clearly superior to other tested active forms. For larger xdic values, the addition of dicamba is able to compensate for the significant loss of MCPA, but it does not result in a clear improvement in DSIL activity. Moreover, the compensation effect facilitates the use of DSILs at lower doses of the active ingredient. AB0.2 applied at a reduced total dose of 305 g of a.i. per ha enables slightly better results compared to the application of the IL A (with MCPA anion only) at a higher dose (400 g ha -1 ). These results confirm our previous findings, in which it was revealed that the DSIL containing the same cation and anions of MCPA and its less biologically active analog, mecoprop-P, along with a small addition of dicamba. Effectiveness at the level of 85% for AB0.2, with a 30% reduction in the dose of active ingredients compared to the recommended doses of commercial formulations indicates the possibility of common lambsquarters control in a crop production, while also reducing the amount of pesticides released into the environment.