A compound of Formula wherein W is O or S; Z is NR1, C(R3R5)NR1, C(R11R12)C(R3R5)NR1, C(R13R14)C(R11R12)C(R3R5)NR1, provided that NR1 is always in alpha of the C=W group; R1 is hydrogen, C 1 -C 6 alkoxy, C 1 -C 6 alkyl optionally substituted by one to five R10, C 1 -C 8 alkylcarbonyl, C 1 -C 8 alkoxycarbonyl, aryl optionally substituted by one to five R10, heteroaryl optionally substituted by one to five R10, or benzyl optionally substituted by one to five R10; R2, R3, R4, R5, R11, R12, R13 and R14 are independently selected from the group consisting of: (i) A bond, hydrogen, C 1 -C 6 alkoxy, C 1 -C 6 alkyl optionally substituted by one to five R10, C 1 -C 6 alkoxycarbonyl, aryl optionally substituted by one to five R10, heteroaryl optionally substituted by one to five R10, a saturated or partially unsaturated 3 to 7 membered cycloalkyl or heterocyclyl, optionally substituted by R10; and (ii) R2 and R4, R3 and R5, R11 and R12 and/or R13 and R14 form an oxo group; R6 and R7 are independently hydrogen, C 1 -C 3 alkyl, hydroxyl, halogen or C 1 -C 3 alkoxy; R8 is hydrogen, C 1 -C 6 alkyl optionally substituted by one to five R10, halogen, C 1 -C 6 alkylthio, C 1 -C 6 haloalkylthio, C 1 -C 6 alkylsulfinyl, N- C 1 -C 6 alkyl amine, N,N-di- C 1 -C 6 alkyl amine, C 1 -C 6 haloalkylsulfinyl, C 1 -C 6 alkylsulfonyl, or C 1 -C 6 haloalkylsulfonyl; R10 is hydroxyl, acetyloxo, cyano, nitro, halogen, C 1 -C 6 alkyl, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, C 1 -C 6 haloalkyl, C 2 -C 6 alkenyl, or C 2 -C 6 alkynyl, C 1 -C 6 alkylthio, C 1 -C 6 haloalkylthio, C 1 -C 6 alkylsulfinyl, N- C 1 -C 6 alkyl amine, N,N-di- C 1 -C 6 alkyl amine, C 1 -C 8 haloalkylsulfinyl, C 1 -C 8 alkylsulfonyl, or C 1 -C 8 haloalkylsulfonyl; or salts or N-oxides thereof. W is O or S; Z is NR1, C(R3R5)NR1, C(R11R12)C(R3R5)NR1, C(R13R14)C(R11R12)C(R3R5)NR1, provided that NR1 is always in alpha of the C=W group; R1 is hydrogen, C 1 -C 6 alkoxy, C 1 -C 6 alkyl optionally substituted by one to five R10, C 1 -C 8 alkylcarbonyl, C 1 -C 8 alkoxycarbonyl, aryl optionally substituted by one to five R10, heteroaryl optionally substituted by one to five R10, or benzyl optionally substituted by one to five R10; R2, R3, R4, R5, R11, R12, R13 and R14 are independently selected from the group consisting of: (i) A bond, hydrogen, C 1 -C 6 alkoxy, C 1 -C 6 alkyl optionally substituted by one to five R10, C 1 -C 6 alkoxycarbonyl, aryl optionally substituted by one to five R10, heteroaryl optionally substituted by one to five R10, a saturated or partially unsaturated 3 to 7 membered cycloalkyl or heterocyclyl, optionally substituted by R10; and (ii) R2 and R4, R3 and R5, R11 and R12 and/or R13 and R14 form an oxo group; (i) A bond, hydrogen, C 1 -C 6 alkoxy, C 1 -C 6 alkyl optionally substituted by one to five R10, C 1 -C 6 alkoxycarbonyl, aryl optionally substituted by one to five R10, heteroaryl optionally substituted by one to five R10, a saturated or partially unsaturated 3 to 7 membered cycloalkyl or heterocyclyl, optionally substituted by R10; and (ii) R2 and R4, R3 and R5, R11 and R12 and/or R13 and R14 form an oxo group; R6 and R7 are independently hydrogen, C 1 -C 3 alkyl, hydroxyl, halogen or C 1 -C 3 alkoxy; R8 is hydrogen, C 1 -C 6 alkyl optionally substituted by one to five R10, halogen, C 1 -C 6 alkylthio, C 1 -C 6 haloalkylthio, C 1 -C 6 alkylsulfinyl, N- C 1 -C 6 alkyl amine, N,N-di- C 1 -C 6 alkyl amine, C 1 -C 6 haloalkylsulfinyl, C 1 -C 6 alkylsulfonyl, or C 1 -C 6 haloalkylsulfonyl; R10 is hydroxyl, acetyloxo, cyano, nitro, halogen, C 1 -C 6 alkyl, C 1 -C 6 alkoxy, C 1 -C 6 haloalkoxy, C 1 -C 6 haloalkyl, C 2 -C 6 alkenyl, or C 2 -C 6 alkynyl, C 1 -C 6 alkylthio, C 1 -C 6 haloalkylthio, C 1 -C 6 alkylsulfinyl, N- C 1 -C 6 alkyl amine, N,N-di- C 1 -C 6 alkyl amine, C 1 -C 8 haloalkylsulfinyl, C 1 -C 8 alkylsulfonyl, or C 1 -C 8 haloalkylsulfonyl; or salts or N-oxides thereof.