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A.A.Seif, icipe
Is this a Minor Pest?
Yes
Minor Pest Title
Bacterial black spot (Xanthomonas campestris pv. mangiferaeindicae)
Minor Pest Description
Bacterial black spot is rain related and is spread through rain splash within an orchard. Long-distance spread is by infected planting material. Important factors in infection are very small wounds that are easily caused by wind and wet weather. On leaves, spots are angular, dark, shiny in appearance and delimited by veins.
Fruit spots start off as water soaked and then become raised and black. Later they crack open in the centre in form of a star. In wet weather, these spots exude gum. Fruit becomes more susceptible with age.
Minor Pest What to do.
- Consider which cultivars are appropriate to grow in wet, humid areas. "Heidi", "Kensington", "Sensation" and "Tommy Atkins" are tolerant to bacterial black spot. Keitt and Kent are highly susceptible to the disease. No varieties are immune.
- Prune off diseased twigs and establish windbreaks around the orchard.
- Copper sprays are the only method of combating the disease and are not always successful when disease pressure is high. 1 or 2 post-harvest copper sprays to cover the post-harvest flush and tail end of the rain season are effective in reducing inoculum (disease) pressure for the following season.
- Monitor for the disease weekly.
Minor Pest Position
3
Minor Pest Firstcontent
124
Pest Type
bacterial
Host Plants
Mango
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