香草兰根腐病生防菌OBS—2的鉴定  

Identification of Bio-Control Agent OBS-2 Against Root Rot Disease of Vanilla

作　　者：曾会才[1] 张开明[1] 文衍堂[2] 

机构地区：[1]中国热带农业科学院植保所,海南儋州571737 [2]华南热带农业大学农学院,海南儋州571737

出　　处：《热带作物学报》1998年第3期44-47,共4页Chinese Journal of Tropical Crops

摘　　要：生防菌OBS－2在盆栽和田间条件下对香草兰镰刀菌根腐病具有良好的防治效果。经形态特征、培养性状和生理生化性状的鉴定，OBS—2菌体杆状，大小0．8～0．9μm×2．2～2．4μm，鞭毛周生，G氏染色阳性G＋，芽孢位置中生，梭形，芽孢囊不膨大，生理生化性状与标准对照菌Bacillussubtilis1．936相似，确定为枯草杆菌Bacillussubtilis。The pot and field tests showed that biocontrol agent OBS-2 gave a good effect on biocontroling the root rot disease of vanilla (Vanilla planifolign caused by Fusarium oxysporum f. sp. Vanillae & F. solani). The OBS-2 was identified through morphological characteristice,culture characteristics,physiological and biochemical properties. The OBS2 is bacilliform in shape,peritrichous, 0. 8～0. 9μm ×2. 2～2. 4 μm in size,and negative inGram stain. Its spores are mesogenous and fusiform,and the cysts fail to expand. The OBS- 2 has similar physiological and biochemical properties to Bacillus subtilis 1. 936,and is hence considered as Bacillus subtilis.

关 键 词：香草兰根腐病 OBS-2 鉴定 

分 类 号：S573.9[农业科学—作物学] S435.73