Use of a copolymer, methods to increase pesticide systemicity, to combat harmful insects and / or phytopathogenic fungi, and to improve plant health, agrochemical formulation, and seeds.
A copolymer obtainable by polymerization of a) at least one compound of the formula (I) (monomer &alpha；) where R1 and R2, independently of one another, are in each case H or CH3, R3 is C6-C10-aryl or C7-C12-aralkyl which can carry one or more identical or different C1-C9-alkyl and/or C1-C5-alkoxy substituents, and n is an integer from 0 to 100, b) at least one compound chosen from the group of N-vinylamides, N-vinyllactams, N-vinylimines and N-vinylamines with 2 to 15 carbon atoms (monomer &bgr；), c) if appropriate one or more different difunctional crosslinker components and d) if appropriate one or more different regulators and e) if appropriate one or more further copolymerizable components (monomer &gamma；) is useful for increasing the systemicity of a pesticide.
