Insecticides usually have an unpleasant smell. In order to cover up these smells, some essences were added to the pesticides. As long as you are not allergic to these flavors, they are generally harmless to the human body. It should be noted that contact with any poison has a quantity problem, and the smell of essence can mask the smell of pesticides. In fact, some pesticides kill insects by smell, and long-term inhalation is definitely harmful to people. It is not the harm of essence smell, but the harm of inhaling pesticides.