Abstract: The present invention relates to the use of a compound, a salt or solvate thereof as C4 plant selective herbicide wherein said compound has a structure according to formula (I) wherein A is a cyclic alkyl, aryl, heterocycloalkyl, or heteroaryl group, and B is a cyclic alkyl, aryl, heterocycloalkyl, or heteroaryl group, and wherein R1, R2, R3, R4 and R5 are, independently of each other H or an alkyl group, and wherein integer i is 0 or 1, preferably 1, and the bond (a) is a single or double bond, and wherein in case (a) is a double bond, n is 0 and X is O or S, and wherein in case (a) is a single bond n is 1, and X is H or an alkyl group, and wherein the bond (b) is a single or double bond, and wherein in case (b) is a double bond, m and p are 0, and wherein in case (b) is a single bond m and p are both 1, and/or according to formula (II) including tautomeric structures thereof, wherein R01 and R02 are independently of each other selected from the group consisting of H, OH, carboxylic acid, ester, alkyl, alkox

Abstract: The present invention relates to the use of a compound, a salt or solvate thereof as C4 plant selective herbicide wherein said compound comprises a cyclic alkyl, aryl, heterocycloalkyl or heteroaryl group, and wherein said compound further comprises a) at least a functional group Z being —C(?Yz)R1, wherein Yz is selected from the group consisting of O, NH and S, preferably wherein Yz is O, and wherein R1 is selected from the group consisting of H, OH and N(R2R3), —O(R2) and —S(R2), wherein R2 and R3, are independently of each other, selected from the group consisting of H, alkyl, cycolalkyl, aryl and heteroaryl and a functional group Q which is —C(?YQ)R4, wherein YQ is selected from the group consisting of O, NH and S, preferably wherein YQ is O, and wherein R4 is selected from the group consisting of H, OH and NR4#R5#, OR4#, SR4# wherein R4# and R5#, are independently of each other, selected from the group consisting of H, alkyl, cycloalkyl, aryl and heteroaryl, or b) at least one electron donating group sel