| 摘要 |
The invention relates to 5-(pyridyl-2'-oxy)-2-nitrobenzoic acid derivatives of the formula <IMAGE> wherein A is the cyano group, the carboxyl group or a salt, an ester, a thioester or an amide thereof, X is halogen or a halomethyl group, Y is hydrogen, halogen or a halomethyl group. These compounds have herbicidal properties and are suitable for selectively controlling weeds in crops of useful plants, especially in soybeans, cereals and rice crops.
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