2021年7月7日 · My DIY Aphid Bug Spray for the Garden. Makes 1 quart of spray. You will need: About 1 quart of water; 1-2 tsp liquid soap; 20-30 drops peppermint oil; Fill a quart jar or sprayer with water. Add 1-2 teaspoons of a liquid soap, like this one. I like to use castile soap, but any sort of liquid dishwashing soap would also work. Add 20-30 drops of ...