Selective inhibition of c4-pep carboxylases

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, alkoxy and halogen, wherein Y 1 is selected from the group consisting of (S(=0)2), S(=0)) and (C(=O)), and wherein Y2 is O, and wherein r is 0 or 1 and wherein in case r is 0, q and s are 1, and wherein in case r is 1, q and s are 0, and wherein R01, R02, R04, R05, R06, R07, R04#, R05#, R06#, R07#, R09, R010, R011 and R012 are independently of each other selected from the group consisting of H, OH, -SO3H, carboxylic acid, ester, alkyl, alkoxy and halogen, said compound being capable of binding to the malate binding site comprised by a phosphoenolpyruvate carboxylase from a C4 plant, thereby inhibiting said phosphoenolpyruvate carboxylase.