Has anyone had problems with Hibiscus Beetles (Aethina concolor) in an outdoor grow?

They are pollen feeders, and come from the surrounding reeds (gorilla grow) that are starting to flower at the same time as my plants, and these little buggers are loving the sticky icky of the forming buds.

From what I've read so far these beetles are notoriously hard to eliminate.

What are successful organic solutions if anyone has had to deal with them?