Substituted pyrimidine-4-formic acid derivative as well as weeding composition and application thereof

The invention belongs to the technical field of pesticide and in particular relates to a substituted pyrimidine-4-formic acid derivative as well as a weeding composition and application thereof. A structural formula of the substituted pyrimidine-4-formic acid derivative is shown as follows: the formula is shown in the description, wherein X represents O, S, unsubstituted or substituted NH; Y represents unsubstituted or substituted aryl and heteroaryl; Z represents halogen; Q represents nitryl or NR1R2; R represents a formula, the formula shown in the description; the substituted pyrimidine-4-formic acid derivative and the weeding composition thereof have excellent weeding activity and crop selectivity. 本发明属于农药技术领域，具体涉及种取代的嘧啶-4-甲酸衍生物及其除草组合物和用途。所述取代的嘧啶-4-甲酸衍生物，其结构式如下：其中，X代表O、S、未取代或取代的NH；Y代表未取代或取代的芳基、杂芳基；Z代表卤素；Q代表硝基或NRR，R代表所述取代的嘧啶-4-甲酸衍生物及其除草组合物具有优异的除草活性和作物选择性。