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甘薯象虫(Cylas formicarius Fab.),和甘薯螟虫(Omphisa illisalis(Walk.)),在国内除甘薯外,还没有报导过发现有其他的寄主植物。过去;我虽然在一些甘薯以外的同属植物上发现有近似甘薯象虫的幼虫所钻蛀的根茎,但没有找到幼虫或蛹寄生在里面;另一方面,通过接种试验,证实甘薯螟虫可以在1.2种其他植物上完成一个生活圈,但在自然界里尚未见到这现象,所以不敢肯定那些植物是这2种害虫的其他寄主植物。今年1月25日,我在福建漳浦港口一块园地(去年不种甘薯)旁发现有几株砂藤,(Ipomoca bilobaForsk.),经采集并剖视结果,曾在2株的茎部和根部
Cylas formicarius Fab., And Omphisa illisalis (Walk.), But no other host plants have been reported except sweet potato in China. In the past, though I found rhizomes that were found in the same genus other than Sweetpotato to resemble larvae of sweetpotato imagoes, no larvae or pupae were parasitized. On the other hand, through inoculation tests, it was confirmed that sweetpotato stem borers could be found in 1.2 A species of life circle has been completed on other plants, but this phenomenon has not been seen in nature. Therefore, it is not certain that those plants are other host plants of these two kinds of pests. On January 25 this year, I found several sand cane (Ipomoca biloba Forsk.) Next to a garden in Zhangpu Port, Fujian Province (no sweet potato last year). After collecting and dissecting the results,