西葫芦在鲁西地区主要发生病毒病、灰霉病、白粉病、菌核病。常因发病造成减产２０％～３０％，严重者达５０％。一、病毒病发病时嫩叶上出现浓绿和淡黄相嵌的花斑，病叶皱缩、叶小和叶柄变短。严重时植株萎缩，节间短粗。发病后期叶片变黄，甚至枯死。病瓜畸形，瓜皮有黄绿相 Zucchini mainly occurs in Luxi area virus disease, gray mold, powdery mildew, sclerotinia. Often due to the incidence of cut 20% to 30%, in serious cases up to 50%. First, the incidence of virus disease appears on the young leaves dark green and yellow embedding mosaic, diseased leaves shrink, leaves and petiole shorter. Severe plant atrophy, short internodes. Late leaves of the disease turn yellow, or even dead. Disease melon deformity, yellow and green with melon skin