老根菠菜常发生霜霉病、炭疽病、斑点病和病毒病.韭菜病害不多,主要有疫病和灰霉病.为保证老根菠菜和韭菜生长良好,现将以上病害防治方法分述如下。一、老根菠菜病害的防治方法(一)菠菜霜霉病1、菠菜要远离葱类种植,不用葱类茬种菠菜.2、收获后清除田间病残株, Old root spinach often downy mildew, anthracnose, spot disease and virus disease .Chives little disease, there are blight and gray mold disease .In order to ensure the growth of root spinach and leek good, now the disease prevention and control methods are described below . First, the old root spinach prevention and control methods (a) downy mildew spinach 1, spinach should be far away from the onion planting, spinach onions without stubble .2, remove the field after harvest stubble,