保护地蔬菜生产大多是在非栽培的寒冷季节中进行的，常因低温影响发生大量落花落果，严重影响产量和效益。目前生产上常用的２，４－D和防落素蘸花保花保果问题较多，２，４－D蘸花常发生畸形果，防落素处理膨大速度慢，浓度易受温度影响而不易控制，蘸花劳动强度大，耗时费工 Protected vegetable production mostly in the uncultivated cold season, often due to the impact of a large number of flowers and deciduous fruits, seriously affecting the yield and benefits. At present, 2,4-D and anti-pigmentation commonly used in production are more likely to be spent on flower and fruit preservation. Malformations often occur on 2,4-D dipping flowers. Slow-processing speed of anti-pigmentation is slow and concentration is not easily affected by temperature. Control, dipping flower labor-intensive, time-consuming work