Abstract:

In order to study the stability and wet-spreading of water-based cypermethrin microemulsions prepared by the mixed surfactants. The stability of water-based cypermethrin microemulsions prepared was studied by the methods of uv-vis spectroscopy and gas chromatograph. The contact angles on Yangfu wheat leaf were measured by using the optical contact angle measuring device. The results showed that the water-based cypermethrin microemulsions have good properties of chemical stability and ageing stability, and have lower surface tension. The contact angles were lower when the solutions were dropped on Yangfu wheat leaf. The results proved that the water-based cypermethrin microemulsions were easily attached to the plant surface, wetting and spreading fastly, so they are suitable to agricultural.