2001791-A1 is referenced by 9 patents.
1,253,143. Combating weeds using urea derivatives. CIBA-GEIGY A.G. 13 Feb., 1969 [13 Feb., 1968; 11 July, 1968], No. 7904/69. Heading ASE. A method for selectively combating weeds in a crop area containing cereal, maize, rice or sugar cane comprises applying to the urea a compound of formula:- in which Y is F or Br; Y 1 is H, Me, CF 3 or MeO; Y 2 is F, Br, Me, CF 3 or MeO; and R is H, C 1-4 alkyl or MeO. CMPP, ioxynil, bromoxynil, benzaldoxime ethers, urea derivatives and triazines also may be present.