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Sooty Mould in Mandarin

How to identify and treat sooty mould in Mandarin.

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Mandarin care requirements

water
Keep soil consistently moist during growing and fruiting; reduce watering in winter dormancy
soil
Well-draining citrus mix or loam-based soil with pH 5.5–7.0; ensure adequate drainage to prevent root rot
light
Full sun (6–8 hours daily); thrives in bright conditions with good afternoon sun exposure
symptoms

Symptoms to look for in Mandarin

  • fiber_manual_recordBlack powdery coating on leaves
  • fiber_manual_recordReduced photosynthesis
  • fiber_manual_recordSticky residue beneath black coating
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Common causes in Mandarin

Grows on honeydew excreted by aphids, scale, or whitefly. Not a direct plant pathogen.

healing

How to treat sooty mould in Mandarin

Treat the underlying pest infestation. Wash mould off leaves with water.

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Preventing sooty mould in Mandarin

Control sap-sucking pests. Good air circulation.