前言瓜类枯萎病的种子传染问题,正以西瓜、黄瓜、葫芦等为试材进行研究。它们的种子带菌情况、带菌机制有许多共同之处,这里以葫芦枯萎病为主记述如下。葫芦枯萎病的种子传染之所以成为问题,主要是因为葫芦用做西瓜的砧木,特别是1974、1975两年在日本全国范围内的大发生,使问题更加严重。苗圃中发病率达20.9%,有的甚至达到48.7%(田中,1975)。据这两年调查各地发病的情况:同一种子商出售的葫芦种子集中发病;嫁接后短时期内 Introduction Melon Fusarium wilt seed infection, watermelon, cucumber, gourd and other materials are being studied. Their seed carrying bacteria, fungi have many in common, here gourd blight mainly described below. The problem of seed transmission of gourd wilt became a problem mainly because gourd was used as a rootstock of watermelon, especially in Japan in 1974 and 1975, which aggravated the problem. The incidence of nursery up to 20.9%, and some even reached 48.7% (Tanaka, 1975). According to the investigation of the past two years the incidence of disease around: the same seed sales gourd seeds concentrated incidence; shortly after grafting