My chicken gizzard Aralia has a colony of insects on it. They are mostly on the new growth. All over the leaves and stems. Green bumps then they turn to white tiny flies. I never seem to see them move. I see the dead ones on the floor and window sill. There also seems to be a sticky substance on the leaves. What is this and how do I get rid of it? I have tried systemic granules and Pyola insect spray but did not seem to even penetrate at all.