According to the symptom,cultivating characters,especially the shape and size of pycnidium and conidia,the pathogen of Dipsacus leaf spot was Septoria dipsaci.

Different treatments were tested in the aloe field and soil in reservoir region of Three Gorges,the result showed:both seedlings and soil disinfected with Ruidumei and nanometer silicon could effectively control aloe seedling diseases;while a contrast experimenta about the effect of nanometer silicon against Ascochyta tini on aloe was studied.

After the colony shape feature observation experiments, the colony growth speed experiments , the spore - producing observation and conidial germination experiments on the parasitic fungus Aschersonia sp.