Biological characteristics of Lasiodiplodia theobromae Pat. causing black-rotten disease of Iongan fruit
2005
Zhang Junian, Lin Hetong, Xie Lianhui
Chinese. 龙眼焦腐病菌[Lasiodiplodia theobromae (Pat.) Griff.& Maubl]是龙眼果实贮藏期焦腐病害的病原菌.本试验观察了龙眼焦腐病菌的形态特征和为害果实症状,研究了温度、pH、湿度、C源、光照对菌丝生长、产孢和孢子萌发的影响.结果表明:龙眼焦腐病菌菌丝生长的最适温度为28~30℃,最适pH为6.0―7.0;产生子座的最适温度为30℃,最适pH为6.0;分生孢子萌发的最适温度为25―35℃,最适pH为5.0―8.0.分生孢子的萌发要求高湿度,其萌发率随着相对湿度的增加而提高,在水中的萌发率可达88.5%,而在相对湿度低于86%时孢子不能萌发.蔗糖、葡萄糖与利于菌丝的生长;蔗糖有利于子座的产生;蔗糖、葡萄糖、麦芽糖和甘露醇均可促进分生孢子的萌发.连续光照有利于分生孢子器的产生.菌丝体的致死温度为52℃(10min),分生孢子的致死温度为53℃(10min).[
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