I live in Karachi, Pakistan. I have a coconut tree, which is about ten years old. It has very sweet fruit, but for the last year it has been infested by some bug, which is microscopic and has a white, powdery look. The plant flowers a lot and initially there is a lot of fruit, which grows to about an inch and a half in size but then it shrivels, blackens and dies. Only one or two of the fruits mature, and I get only about two dozen good nuts per year instead of about 150 per year. I think that it is some kind of bug which burrows into the baby fruit and feeds on it or it feeds on the phloem. I am not sure. I have tried Malathion, etc.