保护地种植蔬菜及瓜果类作物时由于复种次数高,种植茬次密集,瓜果蔬菜类作物又是病虫害高发的作物,土壤中各类有害病菌极易富集;另外由于设施覆盖空气流动性差,小环境中温度和湿度变化剧烈,持续连作造成土壤连作障碍等,均会导致保护地西瓜较露地西瓜更易发生病害。设施环境的规范化使用,对减轻及防治西瓜病害的发生、创造良好生产效益具有很好的应用价值,尤其 Protected areas to grow vegetables and fruits crops due to the high number of seeding, dense planting stubble, fruit and vegetable crops are pests and diseases of crops, all kinds of harmful bacteria in the soil easily enriched; the other due to poor coverage of facilities for the flow of air , Small changes in temperature and humidity, severe continuous continuous cropping caused by continuous cropping obstacles, will lead to protection of watermelon more exposed watermelon diseases. The standardized use of facilities and environment has great application value in mitigating and preventing the occurrence of watermelon diseases and creating good production benefits, especially