⚠ ModerateCucumber mosaic virus mottles leaves with irregular yellow-green patches and distortion, stunting the plant — an incurable, aphid-vectored disease with a vast host range.
Cucumber Mosaic Virus — Mottling & Distortion
Commonly affects: Philodendron spp., Anthurium spp., Syngonium podophyllum, ornamental aroids
Leaves show a patchy mosaic of yellow and green, sometimes with ring patterns, line patterns, or puckering and distortion of the leaf blade. Affected plants are often stunted, with reduced leaf size and diminished vigour. The mottling is irregular and persists in every new leaf, separating it from transient nutrient deficiencies.
Potential Causes
- 1Cucumber mosaic virus (CMV) transmitted by aphids in a rapid, non-persistent manner
- 2Propagation from infected parent plants carrying the systemic virus
- 3Mechanical spread through contaminated tools and handling
- 4A very wide host range allowing the virus to move from many ornamental and weed species
Solution Steps
- 1Accept that the virus is incurable; focus on containment and protecting healthy plants.
- 2Isolate the affected plant well away from the rest of the collection.
- 3Implement strict aphid control, since aphids spread CMV extremely efficiently.
- 4Remove nearby weeds and infected ornamentals that can serve as virus reservoirs.
- 5Never propagate from infected material and sterilise tools between plants.
- 6Discard severely affected plants if isolation is impractical or the collection is at risk.
Prevention Tip
CMV has an enormous host range, so keep the grow area free of weeds and check incoming plants carefully. Rigorous aphid control and tool sterilisation are the practical defences, since the virus cannot be treated once present.
Related Issues to Explore
Dasheen Mosaic Virus — DsMV in Aroids
The classic aroid mosaic virus — both DsMV and CMV are incurable, aphid-spread, and managed through vector control and strict sanitation.
Read guide
Tomato Spotted Wilt & Ringspot — Thrips-Vectored Virus
Another incurable plant virus, but vectored by thrips rather than aphids — both are prevented by controlling the insect vector.
Read guide
Interveinal Chlorosis — Iron or Magnesium Deficiency
Viral mottling is sometimes mistaken for nutrient deficiency — chlorosis follows a vein-related pattern and corrects with feeding, unlike permanent viral mosaic.
Read guide
