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温室、大棚是大田甜瓜白粉病、霜霉病和病毒病发生的主要病源地,呈现出从温室甜瓜到拱棚甜瓜再到露地甜瓜、架子甜瓜,先早熟后晚熟的发生顺序。
Greenhouses and greenhouses are the main source of melon powdery mildew, downy mildew and virus disease in field, showing the order of occurrence of muskmelon from melon to arch melon to melon in open field and muskmelon shelf.