Aphids on Cucumber Plants

Aphids are taking down my cucumber plants, one by one.  I have ant colonies in the bedding and I suspect that they are farming them.  I hate using pesticides.  What can I do to rid those aphids?  Am I stuck using pesticides?

Yeah blast them with water, then sweep remainder of them off with your fingers, then squirt with mix of water and a little washing up liquid. Worked on blackfly on broad beans ok for me.