Chrysanthemum oil contains a chemical called pyrethrum, which repels and kills insects, especially aphids. Unfortunately, it can also kill insects that are beneficial to plants, so care should be used when spraying insect repelling products with pyrethrum in gardens. Insect repellents for humans and pets also often contain pyrethrum. You can also make your own insect repellent by mixing chrysanthemum oil with other fragrant essential oils like rosemary, sage and thyme. However, allergies to chrysanthemum are common, so individuals should always test natural oil products before using on skin or internally.
