番木瓜胶孢炭疽菌的生物学特性研究

Biological characteristics of Colletorichum gloeosprioides Penz.causing anthracnose of Carica papaya L.

对引起番木瓜（Carica papaya）炭疽病的胶孢炭疽菌（Colletotrichum gloeosprioides Penz.）的生物学特性进行了研究.结果表明,该病原菌菌丝生长的温度为10～35℃,最适温度为25～28℃,分生孢子萌发的温度为10～40℃,最适温度为28～30℃;该菌在pH 3～11的范围内均可生长,菌丝生长的最适pH为6,分生孢子萌发的最适pH为5;分生孢子萌发对相对湿度要求严格,在水滴中萌发率最高;该菌在完全黑暗条件下生长速度最快;葡萄糖、乳糖、果糖、蔗糖、麦芽糖、可溶性淀粉能促进分生孢子的萌发和形成;该菌的致死温度为55℃10 min.

The biological characteristics of Colletorichum gloeosprioides Penz. resulting in anthracnose of Carica papaya L. was studied. The mycelia could grow from 10 to 35℃, and the optimum temperature was from 25 to 28℃, the range of pH was from 3 to 11, the optimum pH was at 6; The conidiophores could germinate from 10 to 40℃, the optimum temperature was 28 to 30℃, the range of pH was 3 to 11, the optimum pH was at 5. The conidiophores germination needed high relative humidity and germinated best in water drops; The growth of mycelia was affected by light, it could grow well without light. The glucose, lactose, fructose, sucrose, maltose and soluble starch could promote germination and formation of the conidiophores. The lethal temperature of conidiophores was 55℃ for 10 min.