4-5 tablespoons for a gallon:2 teaspoons per gallon.
"Castile soap is affordable for making small or large batches of the natural insecticidal soap spray. For a small batch mix:
- 1 tablespoon of castile soap
- 1 quart of warm water
- 5 tablespoons of castile soap
- 1 gallon of water"
How To Use Castile Soap For Aphids
Using Castile soap for aphids works great on their soft bodies. The fatty acids dissolve their tough exterior. It is gentler than regular dish detergents. [DETAILS]
plantcaretoday.com
You wanna kill them not piss them off!