Black sigatoka is caused by Mycosphaerella fijiensis. The disease cycle also passes through six stages to maturity largely
similar to those of Yellow sigatoka.

The main difference is at streak stage where Black sigatoka streaks are brown while those of Yellow sigatoka are initially yellow.

This similarity makes it difficult to distinguish the two diseases by symptoms alone.

The disease is characterised by early death of the banana leaves, the appearance of large brownish coloured streaks on
the underside especially of the fourth leaf.

In the absence of control, these streaks which are numerous,coalesce, with black necrotic patches amearine on topside of

the leaf.The blackened (necrotic) areas dry out rapidly and turn brown.

When soaked by rain they tend to become much darker and give the plantation such an unsightly appearance of black dead leaves


Latest News

article thumbnailFarmers in the East African Highlands, centred on Uganda, depend on bananas as a staple food crop and a source of income. The harvest, however, is threatened by many pests and diseases that also...
More inBanana in News  

The vast majority of the bananas currently grown and consumed were not conventionally bred but are selections made over probably thousands of years from naturally occurring hybrids. Cultivated bananas are very nearly sterile and as a consequence are not propagated from seed but rather through vegetative propagation, primarily suckers as well as more recently micropropagated or tissue cultured bananas. These factors, very old selections, near sterility and vegetative propagation, mean that these bananas have not been genetically improved either for resistance or improved quality and are becoming increasing in affected by serious pests and diseases.

Random images from our gallery

  • Vice President Visits Kawanda_39

Latest videos