摘要
本文对１３种蔸兰，２４９个发病器官进行了病原真菌的分离，共获得真菌菌株１９２个，其中立枯丝核菌（Ｒｈｉｚｏｃｌｏｎｉａｓｏｌａｎｉｋｕｈｎ）有１１８个菌株，占整个真菌菌株的６１．４５％，用分离的立枯丝核菌ＹＫ－２６２，菌株对同色蔸兰等４种蔸兰进行了回接试验，共接４２株１３８片叶，发病叶１１２片，发病率平均８８．９％，而对照为８．３％．证明立枯丝核菌是该病的病原菌。用菌丝融合法测试，确定是一个新的菌丝融合群，按国际编号定为ＺＡＧ－８群。绿色木霉菌７８菌株对该病原菌有明显的颉抗作用，初步测定对同色蔸兰立枯丝核菌的防治有效率为８８．８％～９３．３％；对长瓣蔸兰为７７．８％～８１．１％；对带叶蔸兰为７４％．
The pathogenic fungi were isolated from 13 species of paphiopedilum spp and 192 fungi strains of Rhizoctonia which are 118 take the proportions 61.45% of the total.Backvaccinating test were taken on the four species of paphiopedilum.The ratio of the infected has an average of 88.9%, while the consrat group is 8. 3%. With the method of hypha anastomosis grouping the group of R, solai was proved to be a new anastomosis grouping, named after ZAG-8 grouping.The trichoderm virde No. 78 was found having a remarkable restraent against the pathogenic fungi,which has a biological control effect of about 88.8%￣93.3% on P.concolor.and 77.8%￣81.1% on P. adianthum.74% on P.hirsutissimum.
出处
《晓庄学院自然科学学报》
CAS
1994年第1期70-74,共5页
Journal of Natural Science of Hunan Normal University
关键词
立枯核菌
融合群
颉抗菌
蔸兰
Rhizoctonia solani kuhn
anastomosis grouping
antagonism
