| abstract |
The invention belongs to the technical field of pesticides, and particularly relates to a substituted picolinic acid pyridine methylene ester derivative, a preparation method thereof, a weeding composition and application thereof. The substituted pyridine carboxylic acid pyridine methylene ester derivative is shown as a general formula I: wherein A represents alkyl, haloalkyl, alkoxy, alkylthio, halogen, cyano, alkenyl or alkynyl; b represents an unsubstituted or substituted phenyl group; c represents hydrogen, halogen, alkoxy, alkyl, haloalkyl, alkenyl or alkynyl; x represents NR 1 R 2 (ii) a Y represents an unsubstituted or substituted pyridyl group. The compound can solve resistant weeds, has more excellent effects on broadleaf weeds and cyperaceae weeds, and has higher selection index on rice. |