Abstract: In the technical field of plant protection, a microemulsion formulation containing clacyfos herbicide, a preparation method therefor, and the use thereof are disclosed. The microemulsion formulation comprises clacyfos, an environment-friendly solvent and a surfactant. The microemulsion formulation has a particle radius of 0.01 ?m to 0.1 ?m and a pH value of 5 to 7. The microemulsion formulation containing clacyfos herbicide has good dispersibility, small particle size and strong permeability, being a novel green and environment-friendly pesticide formulation.

Abstract: A substituted phenoxyethyl(isopropyl)acyloxyalkyl phosphonate having phosphorusheterocyclic ring and having herbicidal activity, with a general formula of I, wherein R represents 5,5-dimethyl-1,3,2-dioxaphosphorinan-2-one-2-yl, or 1-oxo-1-phospha-2,6,7-trioxabicyclo[2,2,2]octan-4-yl, or 1-sulfo-1-phospha-2,6,7-trioxabicyclo 2,6,7-trioxabicyclo[2,2,2]octan-4-yl; R1 represents H, C1-C4 alkyl, phenyl, furyl, pyridyl, or phenyl substituted with methyl, methoxyl, nitro or chloro; R2 represents H, methyl, and methyl only if R in the general formula I is 1-sulfo-1-phospha-2,6,7-trioxabicyclo[2,2,2]octan-4-yl as phosphorusheterocyclic ring; X and Y represent H, halogen, C1-C4 alkyl or trifluoromethyl, and X and Y are the same or different. The compounds according to the present invention may be used as active component of dicotyledonous broadleaf weed herbicides.

Abstract: Disclosed is a derivative of 2-methyl-4-amino-5-(substituted-1H-1,2,3-triazol)methylpyrimidine of general formula I and microbicidal activity thereof. In the formula, R1 represents hydrogen, I; X represents O or NH; Y represents phenyl of substituted phenyl, benzoyl or substituted benzoyl, phenyloxyacetyl or substituted phenyloxyacetyl; the substituents on the phenyl rings which Y involves are: H, halogen, nitro, cyano, CF3, C1˜4 alkyl, methoxyl, C1˜2 carboxyl or carboxylic ester groups; any position of phenyl rings can be mono- or multi-substituted by identical or different substituents. The compound has a significant inhibition effect on cucumber bacterial angular leaf spot, tomato bacterial leaf spot, cucumber brown blot, cucumber downy mildew, rice sheath blight, Gibberella saubinetii, Alternaria solani, Botrytis cinerea, Alternaria alternate and Colletotrichum orbiculare and it can be used as an effective ingredient of microbicides.

Abstract: Disclosed is a derivative of 2-methyl-4-amino-5-(substituted-1H-1,2,3-triazol)methylpyrimidine of general formula I and microbicidal activity thereof. In the formula, R1 represents hydrogen, I; X represents O or NH; Y represents phenyl of substituted phenyl, benzoyl or substituted benzoyl, phenyloxyacetyl or substituted phenyloxyacetyl; the substituents on the phenyl rings which Y involves are: H, halogen, nitro, cyano, CF3, C1˜4 alkyl, methoxyl, C1˜2 carboxyl or carboxylic ester groups; any position of phenyl rings can be mono- or multi-substituted by identical or different substituents. The compound has a significant inhibition effect on cucumber bacterial angular leaf spot, tomato bacterial leaf spot, cucumber brown blot, cucumber downy mildew, rice sheath blight, Gibberella saubinetii, Alternaria solani, Botrytis cinerea, Alternaria alternate and Colletotrichum orbiculare and it can be used as an effective ingredient of microbicides.

Abstract: A substituted phenoxyethyl(isopropyl)acyloxyalkyl phosphonate having phosphorusheterocyclic ring and having herbicidal activity, with a general formula of I, wherein R represents 5,5-dimethyl-1,3,2-dioxaphosphorinan-2-one-2-yl, or 1-oxo-1-phospha-2,6,7-trioxabicyclo[2,2,2]octan-4-yl, or 1-sulfo-1-phospha-2,6,7-trioxabicyclo 2,6,7-trioxabicyclo[2,2,2]octan-4-yl; R1 represents H, C1-C4 alkyl, phenyl, furyl, pyridyl, or phenyl substituted with methyl, methoxyl, nitro or chloro; R2 represents H, methyl, and methyl only if R in the general formula I is 1-sulfo-1-phospha-2,6,7-trioxabicyclo[2,2,2]octan-4-yl as phosphorusheterocyclic ring; X and Y represent H, halogen, C1-C4 alkyl or trifluoromethyl, and X and Y are the same or different. The compounds according to the present invention may be used as active component of dicotyledonous broadleaf weed herbicides.