I am really struggling with ants farming aphids on my runner beans. Almost every leaf has a dark patch on the underside with an attendant ant. And they then seem to be moving to the flower heads.
I have been using a small sprayer to wash them off. But they are coming back quicker than I can remove them.
Any suggestion for getting rid of them please.
I have stinging nettle tea brewing, but getting it onto the underside of the leaves is difficult.