Antigua and St. Eustatius - if not lethal yellowing then what?

[Hugh Harries]

This report from Antigua also says "This sounds very similar to the disease currently killing off coconut palms on St. Eustatius, which is not a mystery disease but a well-known scourge called lethal yellowing disease, widespread in the Americas, Caribbean and Africa."

But the symptoms in the picture do not look like LY and St Eustatius (aka Statia or Statius) has not previously been mentioned in reports of LY.

Hugh
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http://www.ipsnews.net/news.asp?idnews=107911

ANTIGUA
Mysterious Pest Targets Valuable Palm Trees



If this is not Lethal Yellowing could it be Porroca?

Gilbert, GS & Parker, IM. (2008) Porroca: An Emerging Disease of Coconut in Central America. Plant Disease 92, 826-830.