Long-acting tick-repelling and killing compounded plant essential oil nano-emulsion and preparation method thereof

A method for preparing a long-acting tick-repelling and killing compounded plant essential oil nano-emulsion, wherein the long-acting tick-repelling and killing compounded plant essential oil nano-emulsion comprises the following components in weight percentages:

• 3% of star anise essential oil, 3% of Hydnocarpi Semen essential oil, 21.6-27% of absolute ethanol, and 21.6-27% of Tween-80 at a cosurfactant-to-surfactant ratio of 1:1, and distilled water as a balance;
• wherein the method comprises the following steps:
• 1) selecting materials for the long-acting tick-repelling and killing compounded plant essential oil nano-emulsion for later use;
• 2) mixing and stirring the materials to obtain a first mixture;
• 3) subjecting ingredients of the materials to a second loading, mixing and stirring to obtain liquid materials;
• 4) charging all the liquid materials into a high-speed shearing machine for a further stirring to obtain a second mixture;
• and
• 5) leaving the second mixture to stand after stirring to obtain the long-acting tick-repelling and killing compounded plant essential oil nano-emulsion.