西瓜、籽瓜根病种类的研究

1989～1990年,在石河子、奎屯一带,分别在西瓜和籽瓜的苗期和生长中期,共采集病株标本180份,经分离、回接、再分离,确定致病的病原菌有五种类型,经鉴定分别为:丝核菌(Rhizoctonia solani)、镰刀菌(Fusarium spp)、尖孢镰刀菌(Fusarium oxysporium)、瓜类蔓枯病菌(Mycosphaerella capsicia)、瓜类疫霉菌(Phytophthora melonis),分别引起西瓜和籽瓜的立枯病、烂根病、枯萎病、蔓枯病和疫霉病。苗期以丝核菌引起的立枯为主,占64％,镰刀菌烂根占32％。成株期以镰刀菌引起的枯萎病为主占87％,疫霉病4.6％,蔓枯病占3.8％,丝核菌占2.3％。

A Study on Root Diseases of Watermelon and Seed Watermelon

180 samples of disease plant were collected during seed period and growth period duratioon in Shi-hezi and Quitun in 1989-1990. The samples were divided into five tapes infected fungus; Rhizocto-nia solani, Fusarium spp, F. oxsporinm, Mycosphaeralla cittrullina, Phytophthora melonis, by isolated, reinoculated and reisolated. The fungi induced Rhizoctonia disease, root rot disease, wilt disease, viticula rot disease and blight disease respecively. Rhizoctohnia disease was predominant about 64% and fusarium root rot disease was about 32% during seed period. Fusarium wilt disease was predominant about 87% and Phytophthora blight disease was about 4. 6%, viticula rot was about 3. 8%, Raizoctonia root rot was about 2. 3% during growth duration.