西瓜枯萎病是我省西瓜生产上重要病害,近年来危害严重,一般地块病株率20—30%,严重地块达80—100%,甚至绝产。1986—1988年作者对山东省西瓜枯萎病病原菌进行鉴定,现简报如下: (一)病原菌分离:1986年从山东省临溜等县重病地采集维管束变色的西瓜病株50株,经分离纯化得 Watermelon Fusarium wilt is an important disease in our province watermelon production, serious harm in recent years, the general block rate of 20-30% of the disease, a serious block up to 80-100%, or even abortion. From 1986 to 1988, the authors identified the pathogens of Fusarium oxysporum fusarium wilt in Shandong Province and presented the following briefing: (1) Isolation of pathogenic bacteria: In 1986, 50 strains of watermelon discarded by vascular bundle were collected from Linyi county, Shandong province, Got it