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桑树灰霉病病菌(Botytis cinerea Pers.)生长温度范围5～25℃,最适20～25℃,在10℃以下只能长菌丝,不长分生孢子。分生孢子在有桑叶汁液存在时,萌发快,萌发率高,萌发温度范围7～30℃;最适20～25℃。秋末(10月下旬)采集有分生孢子的病叶悬挂室内,翌年4月中、下旬分生孢子不能萌发,培养基以PSA加桑叶汁液及PDA加桑叶汁液对本病菌生长尤佳。病菌在pH4.4～9范国内均能生长,最适是中性到偏酸,黑光灯照射能促进本病菌分生孢子的形成。
Botrytis cinerea Pers. Grows in the temperature range of 5 ~ 25 ℃, the optimum temperature is 20 ~ 25 ℃, only long hyphal under 10 ℃, not long conidia. Conidia in the presence of mulberry juice, rapid germination, high germination rate, germination temperature range of 7 ~ 30 ℃; optimum 20 ~ 25 ℃. At the end of autumn (late October), diseased leaves with conidia were collected in the hanging chamber. The conidia could not germinate in the middle and late April of the following year. The growth of this bacterium was best with PSA plus mulberry leaf juice and PDA plus mulberry leaf juice. The bacteria can grow in pH4.4 ~ 9, the optimum is neutral to partial acid, black light irradiation can promote the formation of the pathogen conidia.