英语语法分析

The pathogenicity of hypha and spore was weakened.

菌丝和分生孢子致病性减弱。

Pathogenicity is the important factor that mycoplasma infection need treatment.

具有致病性，是支原体感染需要治疗的重要条件。

The high variability in pathogenicity of M. grisea isolates makes the control and management of rice blast difficult.

由于病原菌致病性的高度分化，使得对稻瘟病很难控制和防治。