The insects cause the undersides of leaves to become silvery and the leaves may be deformed. Mealybugs look like white puffs of cotton. They suck plant juices and heavy infestations will coat the leaves with sticky honeydew. Use house plant insect sprays according to label directions. Mites are very small and are hard to see without a magnifying glass.
Heavy infestations can cover the leaves with very fine webbing.
The plants gradually lose their green color and appear dusty or speckled. Use a house plant insect spray 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 honeydes. A black, sooty mold can grow on the honeydes.