Abstract:

Mango bacterial black spot disease is one of the important diseases of mango that may seriously reduce fruit yield and appearance quality. 17 bactericides against Xanthomonas campestris pv. mangiferae-indicae, the pathogen of mango bacterial black spot, were tested using toxic agar plate method in laboratory. The results showed that antibiotics, such as rifampicin, gentamicin, tetracycline hydrochloride and kanamycin strongly inhibited the bacterium, with the minimal inhibitory concentration (MIC) of 0.37μg/mL, 3.75μg/mL, 3.75μg/mL, and 3.75μg/mL, respectively. Sreptomycin, erythromycin and ampicillin were in exception, with MICs were 7.50μg/mL, 15.00μg/mL and 18.75μg/mL, respectively. Among copper-based bactericides tested, thiodiazole-copper had the strong toxicity to the bacterium, with the MIC of 61.90μg/mL. In addition, fenaminosulf has a good antibacterial effect with the MIC of 8.57μg/mL. The bactericides with good antibacterial have potentiality to be used for future control of Xanthomonas campestris pv. mangiferae-indicae in field.