Identifying and Treating Mealybugs on Hibiscus

Mealybug Infestation on Indoor Hibiscus

You’ve discovered small, white, stationary specks on the trunk and limbs of your office hibiscus tree. They rub off easily and lack the cottony appearance of mature mealybugs. This is a classic sign of a mealybug infestation, likely in the early crawler stage.

Immediate Recommendation: Return the Plant

Because the plant came from a retailer already infested, the best course of action is to return it for a refund or exchange. Retailers should not sell pest-infested plants, and treating a heavy infestation indoors is difficult and often unsuccessful.

If You Must Treat

If returning isn’t an option, understand that mealybugs hide in leaf axils, stem joints, and other crevices. Young crawlers lack the protective wax coating and are easily missed. Successful eradication requires complete coverage of all leaf and stem surfaces to the drip point with whatever treatment you choose.

Non-Toxic Options

• Brand X Foliage Cleaner – A silicon-based product that penetrates crevices. Available from Southwest Plantscape Products (www.southwestplantscape.com, 1-800-333-7977).
• Rubbing Alcohol Spray – Mix 1 part isopropyl alcohol with 5 parts water, add a squirt of liquid soap. Spray thoroughly, covering all surfaces. Repeat in 5–7 days to catch newly hatched crawlers. Monitor weekly thereafter.

Important Precautions

• Never spray in direct sunlight or when temperatures exceed 75°F (24°C).
• Test any spray on a few leaves first; wait a few days to check for phytotoxicity.
• Avoid pesticides – they are hazardous and rarely 100% effective against mealybugs.

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