They suck plant juices and heavy infestations will coat the leaves with sticky honeydew. Use house plant insect sprays according to label directions.
Aphids suck plant juices and are usually found at the stem tips.
A heavy infestation will coat the leaves with sticky honeydew. A black, sooty mold can grow on the honeydew. The insects can be green, white, pink or black. Scales are usually brown, hard shells attached to the stems or undersides of the leaves. Sprays are not effective because the shell protects the insects.