Answer: Ants love visiting plumeria because there are little nectar glands on the stems and where the leaves meet the stems. The ants are just collecting nectar - they are not harming your plant in any way. I wouldn't remove the plumeria and I wouldn't worry about the ants - they started to swarm because you disturbed them and by poking a hole in the branch you allowed even more sugary sap to escape, which really got their attention. If there are dead branches on the plant and the ants are hiding in them, you can prune the dead branches off to remove the ant nest. Best wishes with your plumeria!
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