With one of my clients having an active bee hive, controlling insects requires a different approach.
For example, if a rose bush is infested with aphids I would normally reach for something like Confidor or Trifend, however both of these are not particularly friendly to bees.
So with that in mind, I have been mixing 2.5 tbs of dish washing detergent (in this case fruity Morning Fresh Watermelon and Pomegranate) with 2.5 tbs of vegetable oil in 4 lt of water.
Then spray infested plants as normal. Thorough drenching is required here due to this not being a systemic solution.