We had the Ministry of agriculture people to our place in October after losing several trees.The said it would cost 160ytl per month for treatment,they did not know how many treatments neither could they say that it would definitely work.I researched the subject and found that infected cultivated palms from the middle east hd been sold all over the world hence the epidemic in Spin,Egypt,Turkey and even China !The problem is 3 fold in that a bug flies to your plan,lays eggs which hatch into larvae which then burrow into the centre eating the soft core,the tee then rots and collapses.There is not one single effective treatment to cope with the bug,the eggs and the larvae which are obviously at different stages of growth.Once you see the bug your plants are basically kaput!The dvice I was given was take trees out and burn them and replant trees other than palms !