The invention discloses a preparation method of efficient herbicide. The preparation method comprises the steps of
drying vitex negundo,
erigeron canadensis, pepper leaves and
conyza canadensis in the sun, then conducting pulverization, sieving all ingredients with a 100-120-mesh
sieve, conducting the
drying, and obtaining first materials; adding the first materials into
ethyl acetate, conducting mixing uniformly, subsequently conducting
ultrasonic oscillation for extraction, conducting suction
filtration and concentration, and obtaining first coarsely extracted materials; washing and
drying trifolium repens roots,
lilac leaves and
prunus persica chrysanthemoides roots in the sun, then conducting pulverization, sieving all ingredients with a 100-120-mesh
sieve, then placing all the ingredients in water, then adding a compound
enzyme preparation, conducting mixing uniformly, laying the mixture for standing, conducting the
enzyme deactivation, conducting suction
filtration and concentration, and obtaining second coarsely extracted materials; mixing the first coarsely extracted materials and the second coarsely extracted materials uniformly, conducting the reduced pressure
evaporation, and obtaining active materials; mixing the active materials, tea
saponin, lemon
essential oil, haloxyfop, emulsifier, dispersant, thickener, structure modifier, anti-oxidant,
preservative and
soybean oil uniformly, and obtaining the efficient herbicide.