Pacific Pests, Pathogens and Weeds - Online edition

Pacific Pests, Pathogens & Weeds

Mango bacterial black spot (213)

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Photo 1. Angular spots on the leaf, and cankers on the stem, caused by bacterial black spot, Xanthomonas axonopus pv. mangiferaeindicae.

Photo 2. Black irregular-shaped spots on mango fruit, with cracks (right), caused by bacterial black spot, Xanthomonas axonopus pv. mangiferaeindicae.

Summary

  • Worldwide distribution. In sub-tropics and tropics. On mango and cashew. An important disease.
  • Black, angular greasy spots bordered by veins often with yellow halos. Spots merge. Similar on fruits. Flower infections occur; stem cankers cause dieback.
  • Spread in wind and rain, insects and via the nursery trade.
  • Cultural control: disease free rootstocks and scions; nurseries far from orchards; windbreaks to protect orchards; harvest by cutting fruit stalks; prune after harvest and burn cuttings; tolerant varieties.
  • Chemical control: copper every 2-4 weeks, except during flowering, when mancozeb used instead.

Common Name

Mango bacterial black spot

Scientific Name

Xanthomonas axonopus pv. mangiferaeindicae; previiously, known as Xanthomonas campestris pv. mangiferaeindicae (mangiferae-indicae).

AUTHOR Grahame Jackson
Information from Diseases of fruit crops in Australia (2009). Editors, Tony Cooke, et al. CSIRO Publishing; and from Chin D et al. (2010) Field guide to pests, beneficials, diseases and disorders of mangoes. Northern Territory Government, Department of Resources, Australia. (https://dpir.nt.gov.au/__data/assets/pdf_file/0006/227832/mango_field_guide.pdf). Photos 1&2 Kohler F, et al. (1997) Diseases of cultivated crops in Pacific Island countries. South Pacific Commission. Pirie Printers Pty Limited, Canberra, Australia.

Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.

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