When it comes to getting a garden to grow, ants, aphids, beetles, and other pests can be ... well, pests. If so, you're likely willing to try just about anything to nip it in the bud, like sprinkling flour everywhere. Though flour can't necessarily keep weeds away, it can be an effective tool against garden invaders. In fact, when it comes to aphids, sprinkling flour in your garden beds could banish them for good. In other words, sprinkling flour around your garden could create an even tougher type of infestation.