The Cheapest Pest Repellent For Your Garden Is Already In Your Kitchen: Cayenne Pepper’s Active Compound Capsaicin Has Been A Registered Pesticide Since 1962. Here’s How To Use It Right Without Harming Your Plants Or Pollinators
According to Southern Living, gardeners looking for a chemical-free, budget-friendly way to protect their vegetable beds and flower borders from pests may already have the answer on their spice rack: cayenne pepper.
The active compound in cayenne pepper is capsaicin; the same chemical responsible for its intense heat on the Scoville scale, where cayenne typically falls between 30,000 and 50,000 SHU.
Capsaicin has been officially registered with the US government as an insect, rodent and mite repellent since 1962, and it works on a wide range of garden intruders including rabbits, squirrels, deer, chipmunks, aphids, spider mites and slugs by irritating their nasal passages, eyes and skin on contact.
Gardening expert Angelika Zaber recommends sprinkling cayenne powder around the base of affected plants rather than directly onto leaves, especially on edible crops where it can affect flavour. A DIY spray can be made by diluting cayenne pepper in water, or water with mild soap, and applied to plant foliage to tackle soft-bodied insects.
The key limitation: cayenne pepper is temporary. Rain and morning dew wash it away, so it needs reapplying every two to three weeks or after rainfall.
Replacing synthetic pesticides with cayenne pepper does more than protect your garden; it protects the watershed. Chemical pesticides run off into rivers, groundwater and lakes, endangering aquatic life and drinking water sources. A spice that deters pests without leaving a chemical footprint deserves more credit than it typically gets.
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