摘要
由飞机草菌绒孢菌引起的紫茎泽兰叶斑病是紫茎泽兰的重要病害。病原菌孢子萌发和病原菌生长的最适温度为25℃、pH为5.0。饱和湿度下孢子萌发率最高。紫外光照射对菌丝生长发育有抑制作用,而日光灯与室内自然光照射菌丝生长最好,连续黑暗最利于孢子产生。紫茎泽兰鲜叶片加入培养基有促进病原菌生殖生长的作用。病原菌能有效地利用各种碳源,以蔗糖最佳,氮源以蛋白胨最好。
The leaf-spot disease caused by Mycovellosiella eupotoriio-odorai is the most important disease of Eupatorium adenophorum in Yunnan Province. In the laboratory studies, the optimal temperature for conidia germination of the pathogen was 25°Cand the optimal pH was 5.0. The highest percentage of conidia germination was obtained at the condition of saturated moisture (100%). Conidia germination was accelerated by addition of 1% glucose solution to the medium. Growth of the hyphae was restrained by ultraviolet light, but optimized by fluorescent lamp and diffused light. Maximum formation of conidia was obtained at continuous darkness. Adding fresh leaf of E. adnophorum to the cultural medium enhanced spore production of the pathogen. The fungus could effectively utilize all the carbon sources tested. The hyphae grew best in sucrose as a carbon source and in peptone as a nitrogen source.
关键词
紫茎泽兰
绒孢菌
生物学
杂草
Eupatorium adenophorum Mycivellosiella eupatoriio-odorai weed biological control