Unless there is a way to remove the planters from the pond area, I wouldn't use any pesticides that might get into the water. What I would do is use one of those water bottles that people use to mist their plants. Adjust the setting to "stream", and spray the critters with a harsh stream of water. It may have to be repeated several times.

If the bugs are on the pond plants, dip the plants in the pond water to dislodge them. The fish would enjoy a snack.

Thanks for the suggestion nancym

Ron