Frequent outbreaks of citrus gummosis in Kenyan citrus orchards have been reported, yet the identity and distribution of the Phytophthora species causing the disease are unknown.
The distribution and prevalence of Phytophthora species associated with citrus gummosis in Kenya is shown in Table 1.
Ploetz et al, (1997) observed the symptoms of decline, tip dieback and gummosis
from mango nurseries artificially inoculated with Alternaria altemata, Glomerella cingulata, Dothiorella dominicana, Botryodiplodia theobromae and Phomopsis sp.
Whereas brown rot attacks the fruit, gummosis attacks the tree itself.
Gummosis causes blisters on the bark of young peach trees in the third year after planting.