摘要： 从棉田枯萎病株分离得到镰刀菌"8601"菌株.经纯化进行人工接种西瓜及黄瓜幼苗盆栽试验.实验结果表明:"8601"镰刀菌可以侵染西瓜黄瓜幼苗.接种幼苗表现子叶变黄、植株矮小、维管束变褐等枯萎症状;重者枯死,轻者体内带菌.这些幼苗的根、茎内均能分离得到镰刀菌,并能侵染棉苗.

关键词: 棉枯萎, 镰刀菌, 西瓜, 黄瓜

Abstract: Strain 8601 of cotton Fusarium has been isolated from cotton plants with fusarium wilt in field. Young roots of watermelon and cucumber are respectively inoculated with the wilt isolate after its purification.After their emergence from sterilized soil, the seedlings show typical symptoms of wilt. Their cotyledons become yellow, plants dwarfish and vascular bundles brown. Heavily infected plants wither and isolates can be found in plants making a symptomless showing Fusarium which can infect cotton seedlings by artificial inoculation can be isolated from roots and stems of infected watermelon and cucumber plants.The results suggest that the strain of cotton fusarium may infect seedlings of watermelon and cucumber. This discovery may be of great significance to the production of watermelon and cucumber.

Key words: Cotton fusarium, Fusarium wilt, Watermelon, Cucumber