Mealybug Control on Houseplants: Alcohol Spray Method

Mealybugs—those white, cottony pests hiding in leaf axils and stem joints—can be eliminated with a simple, non-toxic homemade spray.

Recipe: 50/50 Alcohol Spray

• 16 oz (2 cups) 70% isopropyl (rubbing) alcohol
• 16 oz (2 cups) water
• 2 tsp mild dish soap (e.g., Dawn)

Mix in a spray bottle. Spray thoroughly—tops and bottoms of all leaves, stems, and soil surface.

Treatment Schedule

• Spray twice a week for at least 3 weeks after all visible bugs are gone.
• Consistency is critical: missed treatments allow eggs to hatch, restarting the cycle.

Why This Works

Alcohol dissolves the mealybugs’ waxy coating, killing on contact. Soap helps penetration. No residual effect means you must repeat to catch hatchlings. It’s safe for plants, pets, and people.

Alternative: Systemic Insecticide

For severe infestations, a systemic granule (e.g., imidacloprid) applied to soil provides months of control. Use outdoors, wear a mask, and follow label directions. But the alcohol spray is effective for most home situations if you’re diligent.

Early detection and persistence win the battle against mealybugs.