1983年,营口地区大白菜普遍减产,从外地调进1,300多万斤才满足了市场供应,给国家造成浪费,菜农减少了收入。营口地区栽培大白菜历史较长,根据历年的经验来看,减产多因病虫为害。例如1980年由于苗期干旱,病毒病发生严重,造成减产;1982年大白菜“干烧心”发生普遍,造成丰产不丰收。去年大白菜减产原因与往年有所不同,经过田间调查,病虫为害较轻。从气象方面来看,1983年7月 In 1983, the common yield reduction of Chinese cabbage in Yingkou was more than 1,300 kg from the field to meet the market supply, causing waste to the country and reducing the income of vegetable growers. Growing a long history of Yingkou area cabbage, according to calendar years of experience, cut more due to pests and diseases. For example, in 1980 due to the seedling drought, virus disease occurred seriously, resulting in reduced production; 1982 Chinese cabbage “dry heart” occurs generally, resulting in high yield does not bumper harvest. Last year, the reasons for the decrease in yield of Chinese cabbage were different from those in previous years. After field investigations, pests and diseases were less harmful. From a weather perspective, July 1983