How to Make a Ladybug Trap with Black Lights

What You'll Need
Round clamp-style lamp
Black light bulb
Hole punch
Hammer and nail
Tape or hole protectors
2 pieces of transparency film (the kind used on overhead projectors)
8 pieces of string, twist ties or cable ties
2 milk jugs (cleaned out)
Hot glue or super glue
Baby powder
Paint (optional)

Ladybugs can benefit your garden, but if you have too many, they can become a nuisance. They can start to infest your home and other parts of your yard where you don't want them. While black light traps are costly in home improvement stores or on the Internet, you can make your own for much less. It doesn’t take that much time to complete your own ladybug trap with black lights, and most of the materials are already lying around your house or garage.

Step 1 - Prepare Your Lamp

Punch four holes, evenly spaced, around the metal lip of your lamp. Do this using a hammer and nail with the light socket facing down. Screw the black light bulb into the lamp.

Step 2 - Prepare the Transparencies

Take the two pieces of transparency film and cut them down the center leaving a ½ inch at the bottom of one sheet and at the top of the other. Slide these two pieces of film together to form an “X” shape. Use the hole punch to put holes in each corner (top and bottom) of all pieces of transparency. There should be eight holes total. Use hole protectors or tape to secure the holes as they will have some weight on them.

Step 3 - Prepare the Milk Jugs

Cut the bottom portion off of one milk jug. Cut a hole in each lid, leaving just enough of the lid to be able to screw it back onto the jug. Glue the rims of the 2 bottles to one another making sure there is enough of a hole for the ladybugs to fall through. If you desire, you can paint the milk jugs. Punch or cut four evenly spaced holes along the edge of the milk jug that has the bottom portion cut off.

Step 4 - Assemble the Ladybug Trap

Using twist ties, cable ties, or string you will attach the three pieces of your trap together. The four holes on the top of the transparency film “X” will attach to the holes in the lamp. The bottom four holes will attach to the four holes in the milk jug. Dump some baby powder on the transparency film so the ladybugs cannot crawl out of the trap.

Step 5 - Use the Ladybug Trap

Once you have your trap assembled, place it in the part of your garden where the ladybugs are the worst problem. Turn on the black light. Ladybugs will be attracted to this light and slip down the transparency film to the bottom of the second milk jug. To empty the ladybugs, simply unscrew the bottom milk jug from the rest of the trap, dump it out, and replace it.