春季种植的大白菜上市正值叶菜类供应的淡季，经济效益高，由于地膜棉的普遍应用，棉行套种大白菜互不影响，增效明显，其种植面积逐年扩大。但由于春季雨水较多，湿度较大，大白菜病虫草害的发生为害较严重，若管理不当或防治不及时，对产量影响较大，甚至绝收。为此，我... The market of cabbage planted in spring is just the off-season supply of leafy vegetables with high economic benefits. Due to the widespread application of mulching cotton, cabbage intercropping cabbage does not affect each other, and the synergism is obvious. The planting area of ​​the cabbage is expanding year by year. However, due to more rain and humidity in spring, the incidence of Chinese cabbage pest and weed damage is more serious. If it is not properly managed or not controlled timely, it will have a great impact on yield and may even fail to meet its requirements. For this, I ...