| abstract |
Herbicidal diphenyl ether compounds of the formula:n or a tautomer thereof, and salts thereof, wherein R 1 is an alkyl group optionally substituted by halogen or phenyl; R 2 is hydrogen, halogen or nitro; R 3 is hydrogen, halogen, alkyl, trifluoromethyl, or cyano; R 4 is hydrogen, halogen, or trifluoromethyl; R 5 is halogen or trifluoromethyl; and R 6 is hydrogen, or C 1 -C 4 alkyl. These compounds are useful as selective herbicides in a range of crops, for example cotton, soya bean, peas, maize, wheat and rice. |