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Here are some more natrual wasp repellent ideas.
This is a page about homemade wasp traps. Buying wasp traps and the attractant at the store can be quite expensive. Making your own traps is easily done with items you may have around the house.
Making a Bee Trap
Getting Rid of Yellow Jackets on...
How to Make a Duct Tape Wasp Nest Decoy
Monologue Of A Killer Wasp
Homemade Wasp Traps
Making Fabric Water Repellent?