Journal of Phytopathology (2017) 165, 800-812
Intan Nur Ainni Mohamed Azni, Shamala Sundram, Vasagi Ramachandran and Idris Abu Seman (2017)
An in vitro investigation of Malaysian Phytophthora palmivora isolates and pathogenicity study on oil palm
Journal of Phytopathology 165 (11-12), 800-812
Abstract: Bud rot disease affecting oil palm in South American countries is reported to be caused by Phytophthora palmivora. P. palmivora is a local pathogen affecting various crops in Malaysia, and this finding caused an alarm, which prompted an investigation of pathogenicity using Malaysian P. palmivora to assess the potentials of this Oomycete to infect oil palm in Malaysia. A total of 11 P. palmivora isolates were obtained from cocoa and durian for the study. Leaf bioassays via artificial inoculation using 50,000 zoospores/ml and mycelial agar disc showed severe necrotic lesions on the infection spot of oil palm (DxP) spear leaves. Mild infection was observed in oil palm spear leaves of OxG hybrids indicating lower susceptibility against P. palmivora infection. Phylogenetic analysis using internal transcribed spacer (ITS) data revealed that Malaysian isolates were genetically similar to Colombian isolates supported by significant bootstrap values. The leaf bioassay results revealed that Malaysian oil palm materials are susceptible towards local P. palmivora infection. The Colombian P. palmivora isolates causing bud rot incidence may have evolved over a long period of time, undergone sequential genetic shift to become more virulent towards Colombian oil palm planting materials.
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Link to article at publishers website
Research topic(s) for pests/diseases/weeds:
general biology - morphology - evolution
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Phytophthora palmivora | Cacao (Theobroma cacao) | Malaysia | ||
| Phytophthora palmivora | Oil palm (Elaeis guineensis) | Malaysia | ||
| Phytophthora palmivora | Durian (Durio zibethinus) | Malaysia |
