Aggressiveness of Ganoderma boninense and G. zonatum isolated from upper- and basal stem rot of oil palm (Elaeis guineensis) in Malaysia

Mohd Rakib Mohd Rashid, . and Bong C. F. J., . and Khairulmazmi Ahmad, . and Idris Abu Seman, . Aggressiveness of Ganoderma boninense and G. zonatum isolated from upper- and basal stem rot of oil palm (Elaeis guineensis) in Malaysia. pp. 229-240. ISSN 1511-2780

Currently the most known devastating oil palm disease throughout South-east Asia is basal stem rot (BSR) caused by Ganoderma boninense. However there is insufficient information on G. zonatum which also has been associated with the BSR and upper stem rot (USR). Thus this study reports pathological symptoms and degree of aggressiveness amongst G. zonatum and G. boninense of USR and BSR on oil palm seedlings. All the Ganoderma isolates tested showed positive signs of infection on the seedlings at 12 and up to 24 weeks after inoculation. However the symptoms of infection on the seedlings were indistinguishable amongst the Ganoderma species tested. In fact they showed significantly different degree of aggressiveness in terms of area under disease progress curve (AUDPC) epidemic rate severity of foliar symptoms (SFS) disease severity index (DSI) stem bole necrosis and primary roots necrosis. The present findings suggested that G. zonatum of USR was the most aggressive followed by G. zonatum and G. boninense of BSR and G. boninense of USR was the least aggressive. Hence a new mechanism of control strategies is urgently required to contain the disease from spreading especially for USR and also for G. zonatum in Malaysia.

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Abstract

Currently the most known devastating oil palm disease throughout South-east Asia is basal stem rot (BSR) caused by Ganoderma boninense. However there is insufficient information on G. zonatum which also has been associated with the BSR and upper stem rot (USR). Thus this study reports pathological symptoms and degree of aggressiveness amongst G. zonatum and G. boninense of USR and BSR on oil palm seedlings. All the Ganoderma isolates tested showed positive signs of infection on the seedlings at 12 and up to 24 weeks after inoculation. However the symptoms of infection on the seedlings were indistinguishable amongst the Ganoderma species tested. In fact they showed significantly different degree of aggressiveness in terms of area under disease progress curve (AUDPC) epidemic rate severity of foliar symptoms (SFS) disease severity index (DSI) stem bole necrosis and primary roots necrosis. The present findings suggested that G. zonatum of USR was the most aggressive followed by G. zonatum and G. boninense of BSR and G. boninense of USR was the least aggressive. Hence a new mechanism of control strategies is urgently required to contain the disease from spreading especially for USR and also for G. zonatum in Malaysia.

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Item Type:	Article
AGROVOC Term:	Ganoderma
AGROVOC Term:	Elaeis guineensis
AGROVOC Term:	Oil palms
AGROVOC Term:	Fungal diseases
AGROVOC Term:	Plantations
AGROVOC Term:	Nursery plants
AGROVOC Term:	Transplanting
AGROVOC Term:	Disease incidence
AGROVOC Term:	Analysis of variance
AGROVOC Term:	Pathogens
Geographical Term:	Malaysia
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	30 Apr 2025 01:14
URI:	http://webagris.upm.edu.my/id/eprint/24340

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