<正>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。

The gray-mold disease of peony and tree peony has been found in Nanjing, Hangzhou, and shanghai. This pathogenic fungus always causes leaf-spots of both hosts, especially after their flowers fade. After artificial inoculation, the fungus will attack hotpeppers, cucumbers, eggplants (aubergines), tomatoes, and grapes. Its conidia are colourless to pale brown, elliptic or ovoid, 8.0-15.0×7.0-10.0μm. According to its morphological characteristics and hosts, the causal pathogen of this gray-mold disease is identified as Botrylis cinerea Pers. ex Fr. The optimum temperatures for its mycelial growth are 20-40°C, and the optimum pH values, 4-8. The fungus is easy to sporulate in 6°Be-malt-extract agar medium and the spore easy of conidial germination in 8°Be malt extract.