Pymetrozine spreading oil as well as corresponding spreading oil and diffusant thereof

The invention relates to pymetrozine spreading oil as well as corresponding spreading oil and diffusant thereof. The invention provides spreading oil used for assisting application of systemic technical for changing an existing application mode of technical for plants in water and also provides pymetrozine spreading oil and high-efficiency diffusant thereof. The high-efficiency diffusant has lower surface stress and can be used for rapidly diffusing effective components of systemic technical on the water surface and the technical film cannot be broken for a long time. The spreading oil for the systemic technical is mainly prepared from the following components in parts by weight: 1-93.5 parts of solvent carrier, 1-20 parts of diffusant and 1-50 parts of diffusion aid; the diffusant is mainly prepared by mixing C12 alkyl alcohol ethoxylate propoxylate phosphate and organosilicone polyoxyethylene ether according to a mass ratio of 1: 3-3: 1.