小麦纹枯病菌菌核形成条件研究

Study on forming conditions of sclerotia in Rhizoctonia Cerealis

研究了小麦纹枯病菌在不同光照、温度、培养基条件下菌核数量形成的差异。结果表明,小麦纹枯病菌在不同的光照条件下都可以形成菌核,但是形成菌核数量有差异。小麦纹枯病菌在24 h光照（即G24）条件下产生的菌核数量最多,其次是光照12 h,而在全黑暗（即G0）的条件下产生的菌核数量较少。小麦纹枯病菌在15-35℃条件下都可以形成菌核,且在15-30℃的条件下,随着温度的升高,菌核数量也在增加,而在高于30℃的条件下形成的菌核数量在减少;小麦纹枯病菌在25-30℃条件下最有利于形成菌核且数量较多。最适合小麦纹枯病菌形成菌核的培养基是PDA培养基。

In this paper, the number of sclerotia in Rhizoctonia cerealis was studied under different illumination,temperature, medium conditions. The results showed that R. cerealis could form sclerotian in different light conditions, but there were differences in the number of sclerotian. The most suitable sunlight condition for forming sclerotian was 24 hours of sunlight, followed by light for 12 hours, while R cerealis produced less sclerotian in the dark. Sclerotia of R.cerealis could be formed at 15-35℃. With the temperature increasing, the number of sclerotia increased at 15-30℃, while the number of sclerotia reduced at above 30℃. The most suitable temperature for forming sclerotian was 25-30℃. The most suitable medium for sclerotia forming of R. cerealis was PDA medium.