[目的]了解茄病镰刀菌对白榆的致病性及致病程度。[方法]通过在白榆细枝接种脐腹小蠹虫伴生真菌镰刀菌和在粗枝上接种镰刀菌等8株坑道真菌进行接种试验,测定脐腹小蠹虫的致病性。[结果]镰刀菌有伤接种可导致白榆粗枝条和细枝条韧皮组织变褐色坏死,从接种变褐色的组织中可重新分离到相同的真菌,说明脐腹小蠹虫的伴生菌镰刀菌可从伤口侵入,对榆树有一定的致病性,但致病性不强。[结论]通过形态学和分子生物学鉴定,确定该镰刀菌为茄病镰刀菌。 [Objective] To understand the pathogenicity and pathogenicity of Fusarium solani to Ulmus pumila. [Method] Pathogenicity of Umbilicus bark beetle was determined by inoculating 8 elm strains of Fusarium necroticum, which were inoculated with Fusarium of Umbella inhabited by Ulva pertussis and inoculated with Fusarium on the thick branches. [Result] Fusarium wounded inoculation could lead to the brown necrosis of the bark of the Ulmus pumila and the fine branches, and the same fungi could be re-isolated from the inoculated brown tissues, indicating that the Fusarium associated strain Invaded from the wound, there is a certain pathogenic Elm, but the pathogenicity is not strong. [Conclusion] The Fusarium was identified as Fusarium solani by morphological and molecular identification.