Neem oil is a natural and safe alternative for many things - including birth control, skin infections, burns, acne, pest control, oral care, parasites in pets (and humans), fungal and bacterial infections, etc. 
Since it has so many uses, I wanted to keep it a pure product. It has a very strong scent and can be mixed with essential oils or diluted with other oils if you choose! Adding tea tree oil will do wonders! You can make into a spray for your plants as well!