Disease symptom
Foliar symptoms on immature palm
The external symptoms of BSR normally comprise of a one-sided yellowing of leaves, or mottling of the lower fronds, followed by necrosis.
The newly unfolded leaves are shorter than normal, appeared chlorotic and additionally the tips may be necrotic. As the disease progresses, palms may take on an overall pale green appearance, with stunted growth with the spear leaves remain unopened and eventually the palm dies. Infected immature palms normally die within 6 to 24 months after the first appearance of the foliar symptoms.
Mild infection. Old leaves turn pale green, some roots infected with slight rotting (bole/stem)
Very severe infection. An advanced stage of infection where the leaves are completely necrotic. Palm with the bole/stem at the base rotting more than 30%.
