Invasive Species Compendium

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Abstract

First record of basal stem rot of foxtail palm Wodyetia bifurcata caused by Ganoderma boninense in Malaysia.

Abstract

In January 2016, a disease inspection carried out at the Royal Selangor Golf Club (Kuala Lumpur, Malaysia) found four foxtail palm (Wodyetia bifurcata) trees infected by basal stem rot (BSR). In the field, the trees were observed to show pale green, wilted leaflets and collapsed fronds with only a single spear leaf remaining. At the base of infected trees, the presence of white fungal primorida, depression in outer bark, and necrotic symptoms were visible on basal stem bark. Dead tissues underneath the outer bark were obvious; the tissues were brown, rotten, and moist with the presence of white mottling mycelia. However, healthy tissues were found to be firm and cream in colour. Rotten stem of the affected palm emitted a mushroom-like odour, brownish, dry, and friable, especially at the centre. Based on morphological characteristics, sequence analysis of the rDNA internal transcribed spacer region and a pathogenicity test, the causal agent was identified as Ganoderma boninense [G. orbiforme]. This is thought to be the first record of G. boninense causing BSR on foxtail palm trees.