在蔬菜反季节栽培中，２，４－Ｄ是茄果类蔬菜保花保果最好的一种植物生长调节剂。但它却最易造成裂果、乳状突起、尖头瓜以及叶枝的病毒状药害。因为２．４—Ｄ的使用浓度既小又要求非常严格，如果调配浓度误差达到５毫克／千克以上，就会发生药害或无效，温度在１５℃～３５ In the cultivation of vegetables against the season, 2,4-D is the best plant flower assortment of plant growth regulators. But it is most likely to cause the split fruit, milky bumps, pointed melon and leafy branches of the virus-like injury. Because the use of 2.4-D concentration is small and requires very strict, if the deployment of concentration error of 5 mg / kg or more, it will occur phytotoxicity or invalid, the temperature at 15 ℃ ~ 35