论文部分内容阅读
高温多雨的夏季,是飞虱、蚜虫、潜叶蝇等迁飞性害虫的盛发期,而雨水和这些迁飞性害虫又是病毒病传播的萤要途径,这就给越夏蔬菜的栽培管理带来了极大的困难。一般情况下,越夏蔬菜感染病毒病的概率是60～100%。蔬菜因感染病毒而绝产的例子已不属罕见。因此,避过病毒病栽培成功的蔬菜,其上市供应期恰好赶上淡季,经济效益十分可观。如果拱圆式塑料大棚不撤掉上一年的旧薄膜,将棚四周下垂的薄膜挽起,以利通风,覆盖在圆棚
High temperature and rainy summer, is the feeding bugs, aphids, leaf miner and other migratory pests flourishing period, and the rain and these migratory pests and virus transmission is the firefly way, which gives the cultivation of summer vegetables Management has brought great difficulties. Under normal circumstances, the probability of virus infection in summer vegetables is 60 ~ 100%. Examples of vegetables that have been killed by the virus have not been uncommon. Therefore, to avoid the success of the virus disease cultivation of vegetables, the market just to catch up with the off-season supply, economic benefits are impressive. If the arched plastic shed does not remove the old film of the previous year, the film will be shed around the drooping film to facilitate ventilation, covering the round shed