What type of compounds in onion liquids act as mild garden pest deterrents?
Answer
Strong sulfur compounds
Beyond their documented nutritional and culinary applications, onion peel liquids possess properties useful in garden maintenance. The strong sulfur compounds naturally present within onions are noted by some gardeners for their mild deterrent effect against certain pests that might otherwise target garden foliage. When this liquid is lightly sprayed onto the leaves of plants, these sulfur compounds can discourage infestations. This method represents an organic and gentle approach to garden care, offering an alternative to the use of synthetic chemical sprays for pest management.

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