Substituted pyrimidine formyl oxime derivative, preparation method thereof, herbicidal composition and application

The invention belongs to the technical field of pesticides, and particularly relates to a substituted pyrimidine formyl oxime derivative, a preparation method thereof, a herbicidal composition and application. The substituted pyrimidine formyl oxime derivative is as shown in a general formula I shown in the description, wherein R1 and R2 independently represent H, halogen, cyano group, nitro group, alkyl group and the like, X represents alkyl, alkoxy and the like, Y represents nitro group or NR3R4, A represents halogen and amino group, B represents hydrogen, halogen, and substituted alkoxy group, alkylthio, alkylamino and dialkylamino containing or not containing halogen, and C represents halogen and haloalkyl. The composition has high herbicidal activity, is highly safer for crops, and has good selectivity for key crops including particularly corn, rice and the like. 本发明属于农药技术领域，具体涉及种取代的嘧啶甲酰基肟衍生物及其制备方法、除草组合物和应用。种取代的嘧啶甲酰基肟衍生物，如通式I所示：R和R独立地代表H，卤素，氰基，硝基，烷基等；X代表烷基、烷氧基等；Y代表硝基或NRR；A代表卤素、氨基；B代表氢，卤素，含有或不含有卤素取代的烷氧基、烷