|A lot of insects are attracted to yellow. A yellow pan trap is a quick and easy way to catch them. Set out a yellow pan or bowl and fill it with an inch or two of water. Add of few drops of detergent to break the surface tension. You can either set the bowl on the ground or place it into a small hole so that its top is level with the ground. Insects that are attracted to yellow (some flies, wasps, and beetles) will fall in and drown.
It is important to check the pan traps every day because insects begin to decompose quickly in water. Transfer the insects to jars of alcohol or dry and pin them promptly.