A review, with 5 refs., of author's own papers on synthesis and agricultural use of mono and bifunctional ionic liqs. In particular, 2 new ionic liqs. with (4-chloro-2-methylphenoxy)acetate and (2,4-dichlorophenoxy)acetate anions and a new ionic liq. with chloride-2-chloroethyltrimethylammonium cation and herbicidal anion were taken into consideration and their properties were described.