Pacific Pests, Pathogens and Weeds - Online edition

Pacific Pests, Pathogens, Weeds & Pesticides

Oil palm genetic orange spotting (205)

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  • Widespread distribution. On oil palms, but the viroid is related to Coconut cadang-cadang viroid and Coconut tinangaja viroid of cocounts. Wherever oil palms are grown. Of minor importance; sometimes 1-2% after 3 years.
  • Of interest because Coconut cadang-cadang viroid of coconut causes the spotting disease in oil palm, and the spotting viroid of oil palm causes cadang-cadang in coconuts, a lethal disease.
  • Spots 2-3 mm on all but the youngest leaves, palms stunted and bunches and nuts smaller than normal. Decline occurs over 20 years.
  • Spread in seed, and perhaps when harvesting.
  • Cultural control: remove palms when symptoms first seen.
  • Chemical control: none recommended.
Common Name

Oil palm genetic orange spotting

Scientific Name

Oil palm orange spotting viroid, and its abbreviation is OOSVd. A viroid is a length of RNA, much smaller than the RNA of the smallest virus, and without a protein coat. OOSVd is closely related to a viroid in the Philippines, Coconut cadang-cadang viroid (CCCVd), which causes a lethal disease in coconuts and other palms.

AUTHOR Grahame Jackson
Information (and Photos 1&2) Hanold D, Randles J (Eds.) Report on ACIAR-funded research on viroids and viruses of coconut palm and other tropical monocotyledons 1985-1993. ACIAR Working Paper No. 51 August 1998. Waite Agricultural Research Institute, University of Adelaide, Glen Osmond, South Australia. (

Produced with support from the Australian Centre for International Agricultural Research under project PC/2010/090: Strengthening integrated crop management research in the Pacific Islands in support of sustainable intensification of high-value crop production, implemented by the University of Queensland and the Secretariat of the Pacific Community.

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