Preparation and application performance of pinolene spray adjuvant

In order to expand the application of pinolene, preparation and application performance of the self-made pinolene spray adjuvant PA was explored. Using Vapor Gard (VG) as a comparison, the surface tension and static contact angle on leaf of Photinia × fraseri Dress. and Carya cathayensis Sarg. of two pinolene spray adjuvants with different concentrations were measured respectively. Influences of two pinolene spray adjuvants on the leaf surface morphology were detected by electron microscopy. Meanwhile, the influences of adding pinolene spray adjuvants in tebuconazole on droplet size, droplet density, coverage and deposition of unmanned aerial vehicle (UAV) spraying were also measured. The results showed that the surface tension and the static contact angles of droplets on both leaves declined significantly with adding each pinolene spray adjuvant, and the greater the amount added, the better the wetting effect. Furthermore, effect of PA was more significant. Both adjuvants can form a film on the leaves which wrapped the pesticide particles, and film-forming of PA was more evenly distributed. When the spray with 0.1% PA added, coverage and deposition were the highest, batter than each treatment of VG. The results suggested that PA contributes to the deposition of droplet, spreading and wetting of solution on the leaf surface, and prolongs effect by forming film, thereby systematically improving the utilization rate of pesticides.