The disorder is caused by the feeding of the leafhopper, Zophiuma butawengi (previously Zophiuma lobulata).
AUTHOR Grahame Jackson
Information from Gitau CW, et al. (2011) Zophiuma lobulata (Hemiptera: Lophopidae) causes Finschhafen disorder of coconut and oil palms. Annals of Applied Biology 158,139-148. Map Woruba DN, et al. (2014) Entomopathogenic fungi of the oil palm, Zophiuma butawengi (Fulgoromorpha: Lophopidae), and potential for use as biological control agents. Austral Entomology 53:268-274. Photos 1-3 Ken Walker (2011) Lophopid Planthopper (Zophiuma butawengi). (PaDIL - (https://www.padil.gov.au).
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.
This mini fact sheet is a part of the app Pacific Pests, Pathogens & Weeds
The mobile application is available from the Google Play Store and Apple iTunes.