Our friend a neighbor built an incredible greenhouse in which she grows all sorts of vegetables and herbs year-round. Somehow aphids found their way in and their population can explode overnight. She uses beneficial wasps to control the aphid population. She was showing us photos of the aphid husk left behind after the wasp eggs hatch in the aphid and find their way out. It was pretty incredible.
She can’t eliminate them, but keeps the population under check. Fortunately, we don’t have Japanese Beetles here in North Idaho. I remember my mom always battling them in her rose gardens in upstate NY and west of Philadelphia. Horrible pest.
Green lacewings control aphids, too.
Aphids attacked my chile pepper plants. I got rid of them by spraying the plants with diluted soapy water in a spray bottle. Use dish soap with a lot of water. Knocks then right out.