Remove as many as you can with a water spray or otherwise manually remove them to get numbers down before you start with other methods
Insecticidal soaps
Neem Oil
Alcohol (9 parts water to 1 part rubbing alcohol)
Beneficial Insects (lady beetles, lady bugs, and lacewings)
Diatomaceous Earth
NOTE: Avoid using nervous system insecticides, such as malathion, Dursban (chlorpyrifos), and Orthene (acephate). They are labeled for use on many shade trees and ornamental plants for aphid control, but are not safe to use on cannabis. If something isn’t safe to be used on edible plants, then chances are it’s not safe to use on cannabis.