Cassava brown streak virus disease

Is this a Minor Pest?
Minor Pest Title

Cassava brown streak virus disease (Potyvirus - Potyviridae)

Minor Pest Description

It is particularly serious in coastal areas of Kenya, Zanzibar, Mozambique and Tanzania and lakeshore region of Malawi and in Uganda and is a threat to the whole of sub-Saharan Africa.

The virus is vectored by whiteflies (Bemisia spp.) and also transmitted through infected cuttings. Symptoms include yellowing (leaf chlorosis) and brown streaks in the stem bark (cortex). Infected tubers have brown streaks (root necrosis) (Field Crops Technical Handbook, MoA, Kenya). It's a stealth virus, which destroys everything in the field. The leaves may appear healthy even when the roots have rotted away.


Minor Pest What to do.
  • Use diseased-free cuttings.
  • Use tolerant/resistant varieties (e.g. "5543/156", "TMS 30572")
  • Remove diseased plants from the field.
Minor Pest Position
Minor Pest Firstcontent
Pest Type
Host Plants