Hi @Don Emery there has been significant discussion about this. The short answer is good environmental management and a higher altitude has kept insects down. If you scroll down the discussion on the ideabook below to owner, Simon Evans, comments you will get a much more detailed answer to your question. https://www.houzz.com/magazine/my-houzz-open-air-living-in-the-mountains-of-bali-stsetivw-vs~4576062