A Plant Parent’s Guide to Treating Mealybugs

Out of all the pests I’ve dealt with as a plant collector, mealy bugs are the uninvited visitors who tend to show up the most! Thankfully, mealy bugs are relatively easy to manage and control.

Mealy bugs are soft-bodied, white, cottony bugs that love to hide in leaf joints and stems, in the cracks and crevices of our beloved plants. These pests feed on our plants’ sap and leave behind a sticky residue called honeydew. All of the following tips come from firsthand experience. Mealybugs seem to love my hoya plants, but have also been spotted in my succulents outdoors. Mealy bugs are a little ruthless as they always seem to attack the new growth as well. I hope these simple solutions to eliminate mealy bugs are effective for you in preventing future infestations!

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How to Identify Mealybugs

Mealybugs look like small clusters of cotton or white fluff. You’ll usually find them:

• In the crooks of stems and leaves

• Along leaf veins

• Near the soil line or in root systems (in more severe cases)

• With a sticky or shiny residue (that’s the honeydew)

If your plant looks a little off, like it’s droopy, discolored, or just not thriving as usual, inspect those leaves. Take a peek at the undersides of your leaves because mealybugs are sneaky.

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Step-by-Step: How to Treat a Mealybug Infestation

 1. Isolate the Infected Plant

Move the plant away from others ASAP. Mealybugs can spread quickly.

 2. Wipe Them Off

Start with a cotton swab or soft cloth dipped in rubbing alcohol (isopropyl alcohol). Dab or wipe the bugs directly. Alcohol dissolves their protective coating, killing them on contact! You’ll see them turn brown instantly. So satisfying.

 3. Spray with a Natural DIY Solution

Mix your own spray using:

• 1 cup water

• 1 tablespoon rubbing alcohol

• A few drops of castille soap

Spray the entire plant, especially under the leaves and around the stems. Do this every few days for at least 2 weeks.

4. Trim If Needed

If the mealy bug infestation is heavy, prune heavily affected leaves or stems. Toss those clippings in your green bin immediately to avoid spreading mealy bugs elsewhere.

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Bonus: Root Mealybugs?

If you suspect mealybugs are hiding in the soil, you may need to:

• Remove your plant from its pot

• Gently rinse the roots

• Re-pot your plant in fresh potting mix

• Clean the container with hot water and soap before reusing

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Prevention Tips

Once you’ve got things under control, it’s all about prevention.

• Inspect new plants carefully before bringing them home

• Wipe down pots and containers

• Avoid overwatering (mealybugs thrive in warm, humid environments)

• Keep your plants dust-free and healthy since happy plants are less vulnerable to pests

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Still Struggling?

Some mealy bug infestations take persistence, so hang in there. Whenever I tackle a plant infested with mealy bugs, I bust out my Q-tips, rubbing alcohol, pop in my earbuds and listen to music or a podcast while I go to town taking out each and every cottony pest. I’ve also been experimenting with another product for pests (diatomaceous earth) so I’ll keep you posted on how it goes!

Your plants deserve to thrive—and so do you! So it’s also totally okay if you find that treating mealy bugs is just not worth your time. When plant care is overwhelming or starting to bug you (no pun intended!), then it’s okay to just toss that plant and move on (RIP to my hindu rope hoya, I tried my best). But when plant care feels like self-care, then we’re on the right track!

Take care,
Nerissa Mamaril
owner, lifesoulgarden plant shop