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芍药灰霉病在南京、杭州、上海主要在花期后危害芍药及牡丹的叶片,形成叶斑。病原分生孢子无色至淡褐色、椭圆形或卵圆形,大小为8.0～15.0 × 7.0～10.0μm。人工接种可为害辣椒、葡萄、黄瓜、茄子、番茄。根据其孢子形态及寄主范围病原鉴定为Botrytis cinerea Pers.ex Fr.。病原菌丝的生长最适温度为20°～24℃,并在pH值4～8之间都生长良好。病菌在6°Be麦芽汁琼脂培养基上容易形成孢子,孢子在8°Be麦芽汁内发芽最好。
Peony Botrytis cinerea in Nanjing, Hangzhou, Shanghai, mainly in peach and peony after damaging the leaves, the formation of leaf spot. Pathogenic conidia colorless to pale brown, oval or oval, the size of 8.0 ~ 15.0 × 7.0 ~ 10.0μm. Artificial inoculation can harm peppers, grapes, cucumbers, eggplants, tomatoes. According to its spore morphology and host-range pathogen identification as Botrytis cinerea Pers.ex Fr .. Pathogenic mycelial growth optimum temperature of 20 ° ~ 24 ℃, and the pH value of 4 to 8 are good growth. Germs sporulate easily on 6 ° Be wort agar medium, and spores germinate best in 8 ° Be wort.