据报导,北京、昌黎等地于4月底或5月初发現梨芽鳞片上有分生孢子生成,成为当年梨黑星病的主要初次侵染来源之一。依我們1956年在熊岳地区的观察,亦发現类似現象。在5月初,将鴨梨的病芽芽鳞片撕下,进行离心檢查,均发現有分生孢子存在(見表1)。而且观察到从病芽抽出的枝梢和叶丛皆生有霉 It is reported that Beijing, Changli and other places in late April or early May found sprouts on pear bud conidia generated, became the first primary source of pear scab one of the sources of infection. According to our observation in Xiong Yue area in 1956, a similar phenomenon was also found. In early May, the pear bud disease bud scales tear, centrifuged, found conidia exist (see Table 1). And observed from the buds of shoots and leaves are all out of mold