Observation of Symptoms in Winter Gourd〔Benincasa hispida(Thunb.)Cogn.〕Inoculated with Viruses

Virus disease is an important disease of winter gourd.In the paper,five viruses were artificial inoculated into seedlings of winter gourd,including Zucchini yellow mosaic virus(ZYMV),Watermelon mosaic virus(WMV),Cucumber mosaic virus(CMV),Papaya ringspot virus(PRSV)and Squash mosaic virus(SqMV).The results indicated that all five viruses could infect winter gourd,but their symptoms,disease incidences and onset times were different according to different virus.SqMV symptoms appeared earliest,WMV at lastest.The disease incidences were all below 30 %,ZYMV was 4 %.