甜椒贮藏期病原菌种类及致病性研究

Studies on Species of Pathogenic Germs and Their Pathogenicity in Sweet Pepper Storage

以亚华15品种甜椒为试材,对甜椒贮藏过程中病原菌的种类、存在部位及致病性进行研究。结果表明:甜椒贮藏前的主要潜伏侵染菌为盘长孢状刺盘孢(Colletotrichum gloeosprioides),辣椒软腐病菌(Erwinia carotovora subsp.carotovora)和交链孢菌(Alternaria alternata),其中果蒂带菌率最高;贮藏期引起果蒂和果柄腐烂的主要致腐菌为镰刀菌(Fusarium sp.)和辣椒软腐病菌,主要引起果肉和果蒂发病,同时盘长孢状刺盘孢也能够引起果蒂和果肉腐烂;贮藏前的表面消毒处理可以降低贮藏期的病害发生率和发病程度。

Using sweet pepper variety Jinhua 15 as material,the species of pathogenic germs,existence tissue and the pathogenicity during storage were studied.The result showed that the main latent invading pathogenic germs were Colletotrichum gloeosprioides,Erwinia carotovora subsp.carotovora and Alternaria alternata before storage,and that amount of pathogenic germs in stem end was maximal.During storage,the pathogenic germs causing decay of stem-end and handle was Fusarium sp.and Erwinia carotovora subsp.carotovora,and mainly caused decay in pulp and stem end.Colletotrichum gloeosprioides also induced decay in pulp and stem-end.The treatment of surface disinfection before storage could reduce the frequency and the degree of disease occurrence.