广东省侵染摇蚊的库蚊虫霉研究
Studies on Entomophthora culicis(Zygomycetes:Entomophthorales) infecting Chironomus sp.(Diptera:Chironomidae) in Guangdong Province
贾春生1** ，洪波2
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作者单位：1.韶关学院英东生物工程学院韶关512005； 2.韶关学院外事处韶关512005
中文关键词：库蚊虫霉,摇蚊,侵染率,广东省,虫霉目
英文关键词： Entomophthora culicis, Chironomus sp., infection rate, Guangdong Province, Entomophthorales
中文摘要： 在中国首次报道了侵染摇蚊的库蚊虫霉(Entomophtora culichs)的形态特征、侵染症状以及发生动态等。库蚊虫霉初生分生孢子，钟罩形，顶部有一明显小尖突，（14.6±1.5）μm×（10.8±1.2） μm。次生分生孢子形似初生分生孢子，但略小，（11.0±1.1） μm×（8.0±0.5） μm。休眠孢子，球形至亚球形，直径（29.3±1.9） μm。被侵染摇蚊尸体以假根附着于基物上，通体覆盖着绿色的真菌子实层。库蚊虫霉侵染率在不同植物上明显不同。库蚊虫霉侵染率随季节不同波动很大，春季最高达90.2%，其次为秋季和冬季，夏季最低为0。2006—2009年库蚊虫霉侵染率为93.5%~95.7%，年际之间变动不大。
英文摘要： This paper presents the first description of aspects of Entomophthora culicis infecting Chironomus sp. in China, including disease symptoms and occurrence dynamics. The primary conidia of E. culicis are campanulate, measure （14.6±1.5）μm×（10.8±1.2）μm and have a distinct apical point Secondary conidia are similar to primary ones but are smaller, measuring （11.0±1.1）μm×（8.0±0.5）μm. Resting spores are （29.3±1.9） μm in size and spherical to subspherical in shape. Infected insects are fixed to the substrate by rhizoids. The sporulating mycelium is greenish and covers the host completely. The infection rate of E. culicis was obviously different in three trees. The infection rate varied between seasons, being lowest in summer (0) and highest in spring (90.2%). There was no significant change in infection rate (93.5%—95.7%) from 2006 to 2009.