Essential oil is a wonderful all natural insect repellent! Peppermint oil will repel flies, ants, bees, roaches, and spiders! Simply add 10 drops of peppermint essential oil to 1/2 cup of water. Using a spray bottle, spray the area you want to be free of pests. Example: for spiders, spray around doors to keep them from coming in the house. For flies, spray around doors, or anywhere you want them to be repelled.
Herbal insect repellents can be an effective alternative, if you are looking to avoid chemicals found in store bought repellents. Here are a few recipes to try.
This is a page about homemade herbal insect repellent sprays. Many herbs are natural insect repellents.
This is a page about tea tree oil as insect repellent. Some people find tea tree oil to be an effective insect repellent. One thing to keep in mind is that it can be toxic to pets, so you should avoid using it for your pet both topically and orally.
This is a page about making a simple mint insect repellant. Mint can easily be grown at home and is an effective repellent for some pests.
This is a page about natural pest control. Making or buying natural pest control products can help reduce that amount to pesticides in our environment.