How do I get rid of mealybugs on succulents?

The white cottony clusters on your succulents are mealybugs, sap-sucking insects that hide in tight crevices and the central rosette. The fastest fix is to dab each one with a cotton swab dipped in 70 percent isopropyl alcohol, which kills it on contact. For heavy or repeat infestations, follow up with a systemic soil drench. Isolate the plant first so the bugs do not spread.

How to spot mealybugs

Mealybugs are easy to recognize once you know the look: small, soft, oval insects coated in white waxy fuzz that resembles tiny tufts of cotton. On succulents they wedge themselves into the tight spots where leaves meet the stem, deep in the center of rosettes, and along the undersides of leaves, all places that are hard to see and easy to miss.

Beyond the bugs themselves, watch for sticky honeydew on the leaves, a black sooty mold growing on that residue, and growth that looks stunted, pale, or shriveled. Pull the plant from its pot now and then to check the roots too, since root mealybugs leave a faint white powder in the soil and feed where you cannot see them. Catching them early makes treatment far quicker.

How to get rid of them

Isolate the plant. Move the infested succulent away from all others immediately so crawling mealybugs and eggs cannot spread.
Dab every bug with alcohol. Touch each mealybug directly with a cotton swab soaked in 70 percent isopropyl alcohol; it dissolves their coating and kills them on contact.
Reach the hidden ones. Use the swab tip or a soft brush to get into the rosette center and leaf joints where they cluster.
Rinse and spray. Rinse the plant gently, then spray all surfaces with insecticidal soap or a diluted neem solution, keeping it out of direct sun afterward.
Apply a systemic drench. For stubborn or repeat infestations, water in a systemic insecticide containing imidacloprid so the plant poisons any bug that feeds.
Check the roots. If they keep returning, unpot the plant, rinse all soil from the roots, look for root mealybugs, and repot in fresh dry mix.
Repeat the cycle. Re-treat every five to seven days for three to four weeks to kill bugs hatching from eggs the first round missed.

How to prevent them

Quarantine every new succulent for two weeks before placing it near others, since shop plants are a common source. Give plants room to breathe rather than crowding pots together, and go easy on fertilizer, because the soft, sappy growth that overfeeding produces is exactly what mealybugs prefer. Inspect the rosette centers and leaf joints whenever you water, and act the moment you see a single white speck.

Pest	Sign	Treatment
Leaf mealybugs	White cotton in leaf joints	Alcohol swab, then soap spray
Rosette mealybugs	Fuzzy clusters in plant center	Brush with alcohol, repeat weekly
Root mealybugs	White powder in soil and roots	Rinse roots, systemic drench, repot
Honeydew and mold	Sticky leaves, black film	Wipe clean, treat the bugs above
Recurring infestation	Bugs return after treatment	Imidacloprid drench, re-treat weekly

Frequently asked questions

What are the white cottony spots on my succulent?

Those are mealybugs. They cluster as small white fuzzy tufts tucked between leaves, in the center rosette, and along stems, and they suck sap that weakens the plant. Dab each one with a cotton swab dipped in 70 percent isopropyl alcohol to kill it on contact.

Does rubbing alcohol kill mealybugs on succulents?

Yes. A 70 percent isopropyl alcohol dab dissolves a mealybug's waxy coating and kills it almost instantly. Touch each bug directly with a soaked cotton swab. Most succulents tolerate alcohol well, but test one leaf first and keep the plant out of direct sun until it dries.

Will mealybugs spread to my other succulents?

Yes, quickly. Mealybugs crawl and their eggs travel between touching pots and on tools and hands. Isolate the infested succulent right away, keep it apart for several weeks, and inspect every nearby plant, since crevices hide them easily.

What is the best systemic for mealybugs on succulents?

A systemic insecticide containing imidacloprid, applied as a soil drench, is the most reliable option for stubborn or repeat infestations. The plant takes it up so any mealybug that feeds is poisoned, including hidden root mealybugs. Follow the label dose and keep treated plants away from pets.

Why do my mealybugs keep coming back?

Usually because eggs survived the first treatment or root mealybugs are feeding unseen in the soil. Repeat your alcohol and spray treatment every five to seven days for several weeks, and if they return, unpot the plant, rinse the roots, and use a systemic soil drench.

How do I check for root mealybugs?

Slide the succulent out of its pot and look at the roots and soil for white waxy residue or cottony specks. Root mealybugs look like a faint white powder among the roots. If you find them, rinse all soil off the roots and repot in fresh, dry mix after a systemic drench.