A diaminotriazine compound of formula wherein A is a fused saturated 5-, 6-membered carbocycle or a fused saturated 5-, 6-membered heterocycle having 1, 2 or 3 heteroatoms or heteroatom moieties, selected from O or NR c as ring members, where the carbocycle and the heterocycle are unsubstituted or carry 1, 2, 3 or 4 radicals R A; q is 1, 2 or 3; R A is selected from the group consisting of halogen, CN, C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy, it being possible that two radicals R A which are bound at the same carbon atom may together be =O; R b is selected from the group consisting of halogen, CN, NO 2; R c is selected from the group consisting of H, CN, C 1 -C 6 -alkyl; R 1 is selected from the group consisting of H, C 1 -C 6 -alkyl, (C 1 -C 6 -alkyl)-carbonyl, (C 1 -C 6 -alkoxy)carbonyl; R 2 is H; X is a radical CR 3 R 4 R 5 wherein R 3 is selected from the group consisting of H, halogen, OH, CN, C 1 -C 6 -alkyl, (C 1 -C 6 -alkoxy)-C 1 -C 6 -alkyl, C 3 -C 6 -cycloalkyl, (C 3 -C 6 -cycloalkyl)-C 1 -C 4 -alkyl, C 1 -C 6 -alkoxy, C 2 -C 6 -alkenyloxy, C 2 -C 6 -alkynyloxy, C 3 -C 6 -cycloalkoxy, (C 3 -C 6 -cycloalkyl)-C 1 -C 4 -alkoxy, where the aliphatic and cycloaliphatic parts of the 9 aforementioned radicals are unsubstituted, partly or completely halogenated; R 4 is selected from the group consisting of H, halogen, CN, C 1 -C 6 -alkyl, C 1 -C 6 -haloalkyl, C 1 -C 6 -alkoxy and C 1 -C 6 -haloalkoxy; R 5 is selected from the group consisting of halogen, CN, C 1 -C 6 -alkyl, C 2 -C6-alkenyl, C 3 -C 6 -alkynyl, C 3 -C 6 -cycloalkyl, (C 3 -C 6 -cycloalkyl)-C 1 -C 4 -alkyl, C 3 -C 6 -cycloalkenyl and C 1 -C 6 -alkoxy-C 1 -C 6 -alkyl, where the aliphatic and cycloaliphatic parts of the 7 aforementioned radicals are unsubstituted, partly or completely halogenated; R 4 and R 5 together with the carbon atom to which they are attached form a moiety selected from the group consisting of carbonyl, thiocarbonyl, C 3 -C 6 -cycloalkyl, C 3 -C 6 -cycloalkenyl, three- to six-membered saturated or partially unsaturated heterocyclyl, and the moiety >C=CR x R y, where R x and R y are hydrogen, C 1 -C 4 -alkyl or C 1 -C 4 -haloalkyl; including their agriculturally acceptable salts. A is a fused saturated 5-, 6-membered carbocycle or a fused saturated 5-, 6-membered heterocycle having 1, 2 or 3 heteroatoms or heteroatom moieties, selected from O or NR c as ring members, where the carbocycle and the heterocycle are unsubstituted or carry 1, 2, 3 or 4 radicals R A; q is 1, 2 or 3; R A is selected from the group consisting of halogen, CN, C 1 -C 6 -alkyl, C 1 -C 6 -alkoxy, it being possible that two radicals R A which are bound at the same carbon atom may together be =O; R b is selected from the group consisting of halogen, CN, NO 2; R c is selected from the group consisting of H, CN, C 1 -C 6 -alkyl; R 1 is selected from the group consisting of H, C 1 -C 6 -alkyl, (C 1 -C 6 -alkyl)-carbonyl, (C 1 -C 6 -alkoxy)carbonyl; R 2 is H; X is a radical CR 3 R 4 R 5 R 3 is selected from the group consisting of H, halogen, OH, CN, C 1 -C 6 -alkyl, (C 1 -C 6 -alkoxy)-C 1 -C 6 -alkyl, C 3 -C 6 -cycloalkyl, (C 3 -C 6 -cycloalkyl)-C 1 -C 4 -alkyl, C 1 -C 6 -alkoxy, C 2 -C 6 -alkenyloxy, C 2 -C 6 -alkynyloxy, C 3 -C 6 -cycloalkoxy, (C 3 -C 6 -cycloalkyl)-C 1 -C 4 -alkoxy, where the aliphatic and cycloaliphatic parts of the 9 aforementioned radicals are unsubstituted, partly or completely halogenated; R 4 is selected from the group consisting of H, halogen, CN, C 1 -C 6 -alkyl, C 1 -C 6 -haloalkyl, C 1 -C 6 -alkoxy and C 1 -C 6 -haloalkoxy; R 5 is selected from the group consisting of halogen, CN, C 1 -C 6 -alkyl, C 2 -C6-alkenyl, C 3 -C 6 -alkynyl, C 3 -C 6 -cycloalkyl, (C 3 -C 6 -cycloalkyl)-C 1 -C 4 -alkyl, C 3 -C 6 -cycloalkenyl and C 1 -C 6 -alkoxy-C 1 -C 6 -alkyl, where the aliphatic and cycloaliphatic parts of the 7 aforementioned radicals are unsubstituted, partly or completely halogenated; R 4 and R 5 together with the carbon atom to which they are attached form a moiety selected from the group consisting of carbonyl, thiocarbonyl, C 3 -C 6 -cycloalkyl, C 3 -C 6 -cycloalkenyl, three- to six-membered saturated or partially unsaturated heterocyclyl, and the moiety >C=CR x R y, where R x and R y are hydrogen, C 1 -C 4 -alkyl or C 1 -C 4 -haloalkyl;