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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.

They’re a nuisance, but silverfish aren’t nearly as dangerous as other pests like cockroaches, mice, termites or bed bugs. They don’t carry diseases that humans or pets can catch, and they don’t cause widespread destruction like termites or rats. Silverfish are small and find it very easy to get inside any exposed foodstuffs. Like weevils, you may find them in unprotected flour, cereal, grains, bread boxes, chip packages and more. They will happily nibble fabric and paper as well, so they can cause damage to furniture, clothing, books, bedding, curtains and other materials.

Stink bugs don't build nests, but they do like to hang around out of sight. They typically hide in cracks, crevices, and tight spaces within buildings, especially during the colder months. They are often found in attics, crawl spaces, and along walls or ceilings. To find them, give these areas a detailed inspection, particularly around windows, doors, and vents.

You can take multiple approaches to keep animals out of your edible landscape. You can use natural repellents such as mint and cayenne pepper to deter them from your garden. You can also build a fence (or opt for a privet hedge) or keep the most enticing plants in a sectioned-off area. The most efficient method of keeping your four-legged guests at bay is to determine what animal it is and create a customized plan for them.