Essential Oils Help Vegetables Repel Insect Pests

A study from the University of Vermont found that essential oils from other plant species can be used to repel insect pests from vegetable crops. Researchers found that essential oils of garlic, spearmint, thyme, eucalyptus lemon, and cinnamon bark were effective at repelling swede midge from broccoli, kale, and other cabbage-family crops in Canada and the northeastern United States. Specifically, this study revealed that plants that are more distantly related from the host plant are generally more repellent. The study concluded that garlic was not only one of the most effective repellents, but that it was already readily available for growers to use.