| abstract |
The invention discloses a novel carboxamide derivative fungicide, the general structural formula of which is as follows: General formula I; wherein R1, R2 are respectively hydrogen, halogen, cyano, C1-C6 alkyl or C1-C6 alkoxy; , six or seven membered non-fused heterocyclic rings, ‑Het is connected by a carbon atom and is substituted at least in the ortho position; the novel carboxamide derivative fungicide of the present invention has excellent activity at low concentrations and good plant tolerance and environmental safety, can inhibit or destroy the disease-curing fungi and bacteria that appear in various plants or soil; the raw materials used in the preparation method of the novel carboxamide derivative fungicide of the present invention are economical and easy to obtain, and the production rate of the preparation method is high. The cost of the synthesis process is low, and it has good bactericidal activity and bactericidal spectrum. |