| abstract |
The invention relates to the field of pesticide technology, and in particular a type of pyridyloxy carboxylate derivative, preparation method, herbicidal composition and application thereof. The pyridyloxy carboxylate derivative is represented by formula I, n n n n n n n n n n wherein, A, B each independently represent halogen, or alkyl or cycloalkyl with or without halogen; C represents hydrogen, halogen, alkyl or haloalkyl; Q represents halogen, cyano, cyanoalkyl, hydroxyalkyl, amino, nitro, formyl, alkyl or alkenyl with or without halogen or the like; M represents -alkyl-R, -haloalkyl-R or n n n n n n n n n n X represents nitro or NR 1 R 2 . The compound has excellent herbicidal activity and higher crop safety, especially good selectivity for key crops such as rice and soybean. |