reminds me of the Ryugyong Hotel in Korea.

http://en.wikipedia.org/wiki/Ryugyong_Hotel

I just got back from Israel. While in the Golan Heights, I saw something that looked similar. It was a bag hanging from a string like that but it had sugar water in it and a small hole poked in it. The idea was that the bugs could find the hole through smell, but could not find their way out once in, and they would eventualy die. (Or at least be stuck in the bag, I would imagine with an huge supply of water and food they could live a good long bug life)

It seemed to work well, there were quite a few bugs in them.