Alternaria yali-inficiens

Other unidentified species of Alternaria cause diseases on Ya Li pear (Pyrus bretschneideri) fruit from China, and diseases could be due to infection by more than one species at a time. Infections were sometimes observed on fruit stems before they progressed to the body of the fruit (Roberts, 2005). If the symptoms described in this datasheet are observed, prompt and correct identification requires microscopic observation of conidiophores and conidia produced on the fruit and in pure culture under prescribed conditions (Simmons, 2007).