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The most effective natural roach repellent is Borax with its key ingredient of boric acid and diatomaceous earth. But some homeowners may not feel like these are “natural” enough, especially since you can’t use Borax around curious pets or toddlers.

On the other hand, studies have shown that oregano oil mixtures have some of the best repellent effects, and other research indicates that catnip oil, peppermint oil, and citrus oils have notable effects on keeping roaches away. Rosemary oil has been shown to be the most effective natural oil for killing cockroaches outright.

According to the Internet Center for Wildlife Damage Management, no frightening devices are proven effective for squirrel control. This is likely because the squirrels quickly become habituated to the noises. However, strobe lights show some promise, so motion-activated lighting could be an option worth considering as part of your integrated pest management strategy.

Naturally occurring EPA-registered Bti products are an effective way to kill off mosquitoes at the larval stage. And, although they won’t wipe them out, there are lots of natural repellents that make your yard less attractive to mosquitoes. Try planting some marigolds, lemon thyme, or other plants they’ll steer clear of, light a citronella candle or two, or lay some bug-offensive cedar mulch.

The truth is you may not be able to get rid of a wasp nest without getting stung unless you hire an insect control specialist. As far as getting rid of wasps with home remedies, a far-reaching commercial spray or an insecticidal dust are your best options with the lowest risk of getting stung. Wearing protective gear can also help minimize stings.