Question: Are there some essential oils that could unintentionally attract unwanted pests? For example, would orange or grapefruit oil attract fruit flies (that are already in the home) to where it’s being diffused? Or a more in general question, do you know of oils that do have constituents that attract unwanted pests?
Answer: Fruit flies are not attracted to citrus oils (or fresh citrus fruit) they are attracted to the vinegary fermentation products of rotting fruit. And you can actually set fruit fly traps filled with apple cider vinegar.
And this may answer your initial question http://aromatherapytoday.blogspot.cz/…/bees-and-essential-o…