Pest identification
What's eating my button cactus?
Mealybugs
Signs: White fluff in the crevices between offsets and around the base; sticky excretion; offsets yellow and detach.
Control: Separate the cluster, treat each section with alcohol swabs, then spray the whole plant with neem oil every 10 days.
Root mealybugs
Signs: White cottony masses on roots; sudden wilting and colour loss despite adequate water.
Control: Unpot, remove all compost, rinse roots, soak briefly in neem oil solution, and repot in sterile cactus mix.
Scale insects
Signs: Small brown bumps on the cactus body; sooty mould from honeydew; slow deterioration.
Control: Scrape off manually with a soft brush dipped in alcohol; apply horticultural oil spray; repeat after 14 days.
Keep button cactus pest-free
Healthy plants resist pests best. Get the basics right:
Button Cactus pests — FAQ
What is eating my button cactus?
Button Cactus (Mammillaria prolifera) is a clustering cactus that is very susceptible to mealybugs hiding between its densely packed offsets. Root mealybugs are equally problematic and often go undetected until the plant collapses. Scale insects are a secondary concern. Inspect the root zone whenever you repot and isolate new acquisitions for a month.
How do I get rid of mealybugs on button cactus?
White fluff in the crevices between offsets and around the base; sticky excretion; offsets yellow and detach. Separate the cluster, treat each section with alcohol swabs, then spray the whole plant with neem oil every 10 days.
How do I get rid of root mealybugs on button cactus?
White cottony masses on roots; sudden wilting and colour loss despite adequate water. Unpot, remove all compost, rinse roots, soak briefly in neem oil solution, and repot in sterile cactus mix.
How do I get rid of scale insects on button cactus?
Small brown bumps on the cactus body; sooty mould from honeydew; slow deterioration. Scrape off manually with a soft brush dipped in alcohol; apply horticultural oil spray; repeat after 14 days.