Butralin nano emulsion and preparation method thereof

The present invention discloses a butralin nanoemulsion, the formula is: volume ratio of 1: 1 to 1: 9, 25 to 70% butralin oil phase, 0.6 to 2.4% polyvinyl alcohol aqueous phase and 0.1 to 1 % stabilizer, of which: butralin oil phase containing 0.1 to 2% emulsifier. Preparation of simple operation of the present invention, the ultrasonic treatment method to achieve the establishment of an oil-in-water nanoemulsion system, obtained butralin small oil droplets, can lower pesticide concentration of efficient long-term effects of tobacco axillary bud germination help protect the safety of personnel administration and reducing the amount of pesticide to protect the environment.