Mealybugs

Description:
Mealybugs are tiny, waxy bugs that look like they have been dusted with powder. They feed on lush, new plant growth and often hide in the crevices of leaf and stem joints. Some mealybugs feed on roots, so always check the root system of plants before purchasing them. Mealybugs produce a honeydew, just as aphids do, and ants will harvest mealybugs for the honeydew, just as they do aphids.

Damage:
Mealybugs love succulents and cacti but they are also prevalent on house plants, citrus, and many ornamentals. They are piercing-sucking insects and cause leaves to be stunted, distorted, and/or yellowed. Also, the honeydew attract sooty mold so there may be dark, sticky spots on the leaves. Root feeding mealybugs cause the plant to weaken and wilt, eventually turning yellow and then dying.

Prevention:
Get rid of ants if you have them. They will protect the mealybugs from predators so they can harvest the honeydew. Natural predators include the mealybug destroyer (a species of ladybug), ladybugs, and green lacewings.

Management:
Mild Infestations:
Insecticidal soap is not effective against mealybugs because of their waxy coating. For one or two indoor plants with mealybugs, take a cotton swab soaked in alcohol and dab each bug with the swab. Be careful not to get alcohol on the plants foliage.

Severe Infestations: Apply an insecticide containing azadirachtin (Neem), diazinon, malathion, or a pyrethrum product. Orthene can be used on ornamentals only. Always apply chemicals according label directions.