Grow your own decoy (#2)
You can trap flea beetles in a similar manner using arugula, the spicy salad green. Pesky flea beetles—a voracious pest of eggplants, brassicas, and potatoes—will flock to the arugula first. Use a handheld vacuum to suck the beetles off the decoy plants before they can make their way to your main crops. You may have to repeat the vacuum cleaner escapade a few times each season to keep ahead of the invading flea beetle army.
Photo: (cc) Eunice/Flickr