更新1:
Moreover, he showed that some rust diseases require two alternate host plants (see Fig. 1-13) to complete their life cycle,e.g.,the fungus causing the stemrust of wheat requires wheat and barberry.
更新2:
DeBary also showed (1886) that some fungi induce rotting of vegetables (Fig. 1-18) by secreting substances (enzymes) that diffuse into plant tissues in advance of the pathogen.