The present invention comprises formulations comprising at least one pesticide and at least one block copolymer of formula (I) wherein Ra is branched or linear C6-C24 alkyl, C3-C8 cycloalkyl, C3-C8 cycloalkyl substituted with C1-C6 alkyl, phenyl, phenyl substituted with C1-C6 alkyl, benzyl, benzyl substituted with C1-C6 alkyl, C4-C6 alkyl substituted with C4-C12 alkoxy or C1-C4 alkyl substituted with di (C1-C4 alkyl) amino; Rb is derived from a diisocyanate and Rc is a compound of formula II (R1)n—X—(CHR2CH2O)w—(CHR3CH2O)χ—(CHR4(CH2)yO)z— (II), in which R1 is hydrogen, or branched or linear, saturated or unsaturated C1-40-alkyl; R2, R3, R4 independently of one another are hydrogen or C1-4-alkyl; w, x, z independently of one another correspond to a value of from 0 to 300; y corresponds to a value of from 1 to 20; X is N or O, where n=1 if X=O, or n=2 if X=N; and the total of w, x and z amounts to at least 1; methods of combating harmful insects and/or phytopathogenic fungi, a method of controlling undesired vegetation and methods of improving the health of plants based on the afore-mentioned formulations.