Sprayer and method for preventing and treating kiwifruit canker by using sprayer

The invention discloses a sprayer and a method for preventing and treating kiwifruit canker by using the sprayer. The sprayer is characterized by comprising a cylinder body, a liquid filling hole arranged on the cylinder body, a handle arranged on the cylinder body and facilitating lifting and taking, and a quick sealing plate, a safety valve, a pressurizing valve and a spraying valve which are arranged on the cylinder body, wherein a spraying pipe is detachably connected with and arranged on the quick sealing plate. According to the invention, by adoption of the sprayer, the fertilization efficiency of a biological agent mixed fertilizer is improved; meanwhile, the viscosity of a biological agent is increased by addition of a filling material A, so the biological agent is stronger in adhesive force on branches and trunks, not easy to fall off and not easy to volatilize, and the utilization rate of the biological agent is improved; and through addition of a filling material B, water iseffectively disinfected