Materials: plastic bottle, cap of plastic sauce container, yeast, and water
First, get a plastic water bottle and cut it in half (you will need as many water bottles as traps you would like to place)
Then, you will need to cut down a "to-go" sauce lid to the size of the bottle's circumference and poke holes in the divider
Next, add water and yeast to the bottom of the bottle. About a half inch will do.
After, push the divider into the bottle, just above the water line.
Next, dig a hole big enough to have the trap at the level of the ground
Last, place the traps every 15-30 yards, depending on farm size.