Patent ID: 6444613
Filing Date: 2002-09-03
Classification: A01N

Abstract:
A method for effecting leaf abscission in plants which comprises treating plants with a mixture comprising(A) thidiazuron or thidiazuron and diuron and (B) one or more PPO inhibitors of the formula (I) Wâ€”Vâ€ƒâ€ƒ(I), â€ƒfor effecting leaf abscission of plants, where the symbols in the formula (I) have the meanings: and or and or and R1 is hydrogen or halogen; R2 is halogen, alkyl, alkoxy, haloalkoxy or haloalkyl; R3 is hydrogen, alkyl, haloalkyl, alkoxy, haloalkoxy, alkyl-S(O)nâ€”, dialkylamino, alkylamino, amino or halogen; R4 is hydrogen, alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl, haloalkynyl, formyl, alkyl-COâ€” or amino; R5 is hydrogen, halogen, alkyl, haloalkyl or nitro; R6 is hydrogen, alkyl or haloalkyl; R7 is hydrogen, alkyl or haloalkyl; R8 is hydrogen, alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl or haloalkynyl; R9 is hydrogen, alkyl, halogen, alkoxy, haloalkyl, haloalkoxy, alkoxycarbonyl, haloalkoxycarbonyl or amino; R10is hydrogen, alkyl, halogen, alkoxy, haloalkyl, haloalkoxy, alkoxycarbonyl, haloalkoxycarbonyl or amino; R11 is hydrogen or alkyl; R12 is hydrogen, alkyl or halogen; R13 is hydrogen, halogen, alkyl, haloalkyl, alkoxy, haloalkoxy, cyano, nitro, amino, alkylamino, dialkylamino, alkoxycarbonyl, â€”(C&boxH;O)NH2, â€”(C&boxH;S)NH2, hydroxyl, acyloxy, substituted phenyl, substituted phenoxy, substituted benzyl or substituted benzyloxy; R14 is hydrogen, alkyl, haloalkyl, alkoxyalkyl, haloalkoxyalkyl, alkenyl, haloalkoxyalkenyl, alkynyl, haloalkynyl, alkoxy, haloalkoxy, haloalkenyloxy, alkynyloxy, haloalkynyloxy, halogen, â€”Oâ€”COR15, â€”OH, â€”S(O)nR15, â€”COR17, â€”CONR18R19, â€”CO2R20, â€”(CR6R7)nâ€”CO2R20, â€”CR21&boxH;CR22CO2R20, â€”CN, â€”CR11(X1R23) (X2R24), â€”NR11â€”(CR6R7)nâ€”CO2R20, â€”Oâ€”(CR6R7)nâ€”CO2R20, â€”S(O)nâ€”CR21&boxH;CR22â€”C(O)NR16R17, â€”(CR6R7)nCONR16R17, â€”(CR6R7)nâ€”CO2R20, â€”NO2, â€”NR16R17, â€”NR24SO2R15 or â€”NR23COR15; R15 is hydrogen, M, alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl, haloalkynyl or halogen; R16 is hydrogen, alkyl, aloalkyl, alkenyl, haloalkenyl, alkynyl, haloalkynyl or halogen; R17 is hydrogen, OH, OM, alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl, haloalkynyl, alkoxyalkyl or haloalkoxyalkyl; R18 is hydrogen, alkyl, alkoxy, alkenyl, haloalkenyl, alkynyl or haloalkynyl; R19 is hydrogen, alkyl, alkoxy or R18 and R19 together with the nitrogen atom form a 5-, 6- or 7-membered ring which may be interrupted by oxygen or sulfur; R20 is hydrogen, M, alkyl, haloalkyl, alkenyl, haloalkenyl, alkynyl, haloalkynyl, alkoxyalkyl, haloalkoxyalkyl or â€”(CR6R7)nâ€”CO2R15; R21 is hydrogen, alkyl, halogen or CN, R22 is hydrogen, alkyl, halogen or CN; R23 is hydrogen or alkyl; R24 is hydrogen, alkyl or R23 and R24 together are a substituted or else unsubstituted 5-, 6 or 7-membered cyclic acetal or thioacetal; R25 is hydrogen, alkyl, alkoxy, alkenyl, haloalkenyl, alkynyl, haloalkynyl, carbamoyl or thiocarbamoyl; M is an alkali metal, alkaline earth metal or ammonium ion; X1 is identical or different and is C-R5 or N; X2 is identical or different and is CR2R6, O, â€”S(O)nâ€” or NR25; Y1 is O or S; Y2 is O or S; n, are 0, 1 or 2; U1 is O, S(O)n, NR23 or CR9R10. U2 is S(O)n, CR9R10 or C&boxH;O; T is CR2R6, NH or NR2.