For example, planting garlic among vegetables helps to repel certain beetles, and planting basil near tomatoes repels hornworms. Make sure debris where insects may live is removed. For indoor pests, before turning to chemicals, remove the insects water supply. Fix leaky cracks and don't let water stand at the bottom of your plants. Remove the insect's food supply as well.
Ants hate red chili powder.
You might try chopped bay leaves and cucumber skins to get rid of roaches. This can include sprays, powders, and pet collars. The health risk to humans is also essentially the same as with pesticides. The residue of a fogger lasts for many months on upholstery, stuffed animals, and bedding of adults and children. Not to mention that foggers do not penetrate under solid objects such as couches, and therefore are not an extremely beneficial pest control products.