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Chinese Journal of Biological Control ›› 2024, Vol. 40 ›› Issue (6): 1439-1446.DOI: 10.16409/j.cnki.2095-039x.2024.02.070

• SCIENTIFIC NOTES • Previous Articles    

Research on the technology of preventing and controlling mango bacterial leaf spot

LIN Hanghang1,2, ZHAO Xinyu2,3, WANG Linhui4, CHEN Xusheng5, WAN Sanlian6, WANGQiuxia2,3, TENG Chunhong1   

  1. 1. College of Plant Protection, Northeast Agricultural University, Harbin 150030, China;
    2. National Nanfan Research Institute (Sanya), Chinese Academy of Agricultural Sciences, Sanya 572024, China;
    3. Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing 100193, China;
    4. College of Plant Protection, China Agricultural University, Beijing 100193, China;
    5. College of Advanced Agricultural, Ecological and Environmental Sciences, Heilongjiang University, Harbin 150080, China;
    6. Hainan Nanfang Administration, Sanya 572000, China
  • Received:2024-01-18 Published:2024-12-12

Abstract: In order to investigate the effective control techniques against mango bacterial leaf spot, this study used phytopathogenic bacteria isolation methods to isolate and identify mango bacterial leaf spot in Yazhou District, Sanya City, and to detect its pathogenicity. The efficacy of several agents against mango bacterial leaf spot was evaluated by indoor virulence determination, field plant spray and soil root irrigation treatments. The results showed that the causal agent of mango bacterial leaf spot was Xanthomonas critis pv. mangiferaeindicae. The indoor virulence assay showed that 30% cyano-prothioconazole and 25% oligosaccharide-ethylicin had good virulence against mango bacterial leaf spot, with EC50 values of 0.28 and 0.38 mg/mL. The results of the field experiment showed that after 30 d of the plant spray treatment, the efficacy of 50% Chlorobromoisocyanuric acid + 25% oligosaccharide-ethylicin mixture against mango bacterial leaf spot was still 71.02%, and the efficacy of 10% Prothioconazole + 25% oligosaccharide-ethylicin and 50% Chlorobromoisocyanuric acid + 25% oligosaccharide- ethylicin against mango bacterial leaf spot were 87.68% and 85.57%, respectively, after 30 d of the soil root irrigation treatment. The results of this study provide an important reference for the effective control of mango bacterial leaf spot.

Key words: Xa nthomonas citri pv. mangiferaeindicae, separation and identification, toxicogenicity testing, leaf spray, watering root

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