Mealybugs on Herbs: How to Identify and Eliminate These White Pests

If you spot tiny, white, cotton-like clusters on your herbs—especially around leaf joints or stem bases—you’re likely dealing with mealybugs. These sap-sucking insects weaken plants over time, cause stunted growth, and invite other problems like mold.

Let’s break down how to detect them early and stop them before they take over your garden or indoor plants.

What Are Mealybugs?

Mealybugs are soft-bodied, white insects that secrete a waxy coating, making them look like fuzzy cotton on stems and leaves. They feed by piercing plant tissue and sucking out juices, leading to yellowing, curling leaves and a general loss of vigor.

Common Signs of Mealybug Infestation

• White, fluffy clusters on stems, leaf joints, and undersides

• Sticky residue (honeydew) on leaves or soil surface

• Presence of black sooty mold growing on the honeydew

• Wilting or distorted new growth

• Slowed growth or plant decline

They especially love warm, humid environments—like indoor herb gardens or greenhouses.

How to Get Rid of Mealybugs (Effectively)

1. Manual Removal
   Use a cotton swab dipped in rubbing alcohol (70%) to dab and kill visible mealybugs.

2. Rinse Plants Thoroughly
   Wash with a strong stream of water, especially under leaves and in crevices.

3. Apply Neem Oil or Insecticidal Soap
   Spray the entire plant every 3–4 days for 2 weeks. Focus on hidden spots.

4. Prune Severely Affected Parts
   Dispose of them far from your growing area to avoid spreading.

5. Repeat and Monitor
   Mealybugs are persistent—stay consistent with treatment and watch for reinfestation.

Natural Prevention Tips

• Avoid over-fertilizing—mealybugs love nitrogen-rich, soft new growth

• Isolate new plants before adding them to your setup

• Keep humidity in check, especially indoors

• Wipe plant pots and trays regularly with diluted alcohol or vinegar solution.