Homemade Organic Aphid Spray -Fill a spray bottle with water about 3/4 of the way to the top, add a squirt of biodegradable dish soap, and a couple cloves of garlic, minced. Mix it all together, let it sit overnight for greater strength, and spray it on your plants.
Garlic Oil Spray Organic gardeners have long relied on garlic as part of their pest-fighting arsenal. Garlic contains sulfur, which, besides being toxic to pests, is also an antibacterial and antifungal agent. The dish soap in this mixture also breaks down the bodies of soft-bodied pests, such as aphids.
COMPLEX APHID KILLER SPRAY 1.5 tablespoon baking soda 1 tablespoon Murphy’s Oil Soap 1 tablespoon Vegetable Oil 1 tablespoon Vinegar 1 gallon water Directions: Pour into spray bottle and spray liberally on tops and bottom of leaves ensuring aphids are covered completely.