Co-infection of two Ganoderma boninense strains on oil palm seedlings

Ganoderma boninense is the basal stem rot disease (BSR) pathogen that devastates oil palm plantations. Disease infection generally occurs by a single strain of G. boninense, or co-infection two strains arises as revealed somatic incompatibility. This study aimed to determine effects somatically incompatible on BSR seedlings. Two were from 2 plantations and had different aggressiveness. Co-infection was performed inoculating rubber wood blocks 3-month-old seedling examined for 7 months. The results showed with similar symptoms, decreased severity (score 1.5 compared 2.0 aggressive strain), growth retardation strain. Higher fungal colonization (92%) roots exhibited in 85‒86% infection. might favor host boninense.