The invention belongs to the technical field of pesticides, and particularly relates to an insecticidal
microemulsion as well as a preparation method and an evaluation method thereof. The insecticidal
microemulsion comprises the following
raw material components: 2.5-20 parts of an insecticide, 5-20 parts of a functional emulsifier, 5-30 parts of a synergistic emulsifier, 5-25 parts of an
organic solvent, 0.1-10 parts of a stabilizer, 0.05-2 parts of a pH
regulator and the balance of water, totaling 100 parts. The insecticide comprises at least one of a
pyrethroid insecticide, a biological insecticide and a
neonicotinoid insecticide; and the synergistic emulsifier has
wetting permeability and
moisture retention. Through the combined action of all the
raw material components, the
wetting, permeating and moisturizing performance of the insecticidal
microemulsion on soil is remarkably improved, and in the
wetting and permeating aspect, the
pesticide liquid can be rapidly attached, wrapped and covered on soil particles along with the synergistic emulsifier. In the aspect of
moisture preservation, after the liquid
medicine is attached to soil particles,
moisture can be locked in particle pores by the synergistic emulsifier, the
evaporation rate is slowed down, and the survival time of the liquid
medicine is prolonged.