Having a garden invaded by aggressive wasps, I’m planning to build a few wasp traps, inserting top of a bottle as a funnel to the bottom part, where I’ll put some bait. This is one of the most popular DIY trap on the Internet from what I’ve seen.
Yet, what exactly prevent wasps from leaving the trap? All sites describe how to build such a trap, but not the why it works.
Thanks! 🙂
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I think a lot of them have some kind of liquid at the bottom, which stops the wasps from escaping.
I guess it’s also kind of similar to diffusion in science, where if the rate at which wasps go in to the trap is greater than the rate at which wasps escape, there will be a net movement of wasps in to the trap.
One of the key features of this trap is that it is clear. The wasp perceives itself as being outside so when it is ready to leave it flies straight up. When an insect is inside a dark container they look for the light to find the exit. This is why flies get trapped in your house and try to fly out closed windows. You need to darken all the windows, turn off the lights, and open the door and the fly will go right out the door.
As the wasp continues to try to fly out it becomes exhausted and drowns in the liquid at the bottom of the trap.
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