论文部分内容阅读
1985年,河南省小麦赤霉病发生普遍,我们从65个县市搜集了214份病穗标样,分离出241个菌株,经鉴定为禾谷镰孢(Fusarium graminearum)、半裸镰孢(F.se-mitectum)、半裸镰孢大孢变种(F.semitectum var majus)、燕麦镰孢(F.av-enaceum)、木贼镰孢(F.equiseti)、串珠镰孢(F.moniliforme)、锐顶镰孢(F.acuminatum)和硫色镰孢(F.sulphureum)。禾谷镰孢为优势致病菌,占标样总数的98％,同一病穗上常常可以分离到两种镰孢。禾谷镰孢和燕麦镰孢的致病力强,其余的均为中和弱致病种。致病菌种类与不同地域的分布,没有明显的关系。
In 1985, the occurrence of wheat head blight in Henan Province was widespread. We collected 214 samples of disease ear from 65 counties and cities and isolated 241 strains. The strains were identified as Fusarium graminearum, F F. semitectum var majus, F. av-enaceum, F. equiseti, F. moniliforme, F. acuminatum and F. sulphureum. Fusarium graminearum is the dominant pathogenic bacteria, accounting for 98% of the total number of standard samples, the same disease can often be separated on the ear two Fusarium. The pathogenicity of Fusarium graminearum and Fusarium oxysporum is strong, and the rest are neutral and weakly pathogenic species. Pathogen species and distribution of different regions, there is no obvious relationship.