The study revealed that the prevalence of the symptoms was high between 50 to 60% in two plantations. The
incidence of the disease in each plot was low between 0 to 6%. The disease symptoms was more often found
where the symptom syndrome in a chronic (level 3) or critical state (level 4). The disease was present in newly
established plantations and younger stands are vulnerable to vascular wilt disease attacks. Silvicultural
management that introduces wound on the stem of trees was related to increased disease incidences.