香蕉枯萎病拮抗菌的筛选及盆栽防效的测定

Antagonistic Microorganisms Screening and Pot Experiment against Fusarium oxysporum f. sp. Cubense

从香蕉根围土壤中分离得到了六株对香蕉枯萎病具有较强抑制作用的拮抗菌,其中真菌2株(F1、F2)、细菌3株(B1、B2、B3)、放线菌1株(A1)。利用土壤接种法和蘸根接种法分别测定了这6株拮抗菌对香蕉枯萎病的盆栽防治效果。结果表明:这6株拮抗菌对香蕉枯萎病均具有一定的防效,其中真菌F2菌株对香蕉枯萎病的防治效果最好,在接种其发酵液60 d后,两种接种方法的平均防效分别达60.54%和67.84%,这为利用生物防治方法控制香蕉枯萎病提供了潜在的资源。

Six strains of antagonistic microorganisms were isolated from the rhizosphere of banana. These isolates included two strains fungi （F1 ,F2）, three bacteria （B1,B2,B3） and one aetinomyeete （A1）. The pot experiment of the six strains antagonistic microorganisms against Fusarium oxysporum f. sp.cubense （FOC） was tested with root-dip inoculation and soil infestation, respectively. The results indicated that the F2 had the highest effect among of the six strains, which had some effect on control of FOC. After inoculated 60 dayes, the average effect of F2 were respective 60.54% and 67.84% with two methods. These were consequently considered as potential biocontrol agents against FOC.