Pest identification
What's eating my coryphantha vivipara?
Mealybugs
Signs: White cottony clumps among areoles and around the tubercle bases; sticky honeydew; weakened, shrivelled plant
Control: Remove with isopropyl alcohol on a cotton swab; spray neem oil; quarantine plant and repeat weekly until clean
Root mealybugs
Signs: Poor growth and wilting with white waxy powder on roots discovered on unpotting
Control: Remove all old soil, soak roots in systemic insecticide solution, dry and replant in fresh sterile cactus mix
Spider mites
Signs: Stippled or bronzed patches on the cactus body; fine webbing in dry indoor conditions
Control: Spray with insecticidal soap or dilute neem oil; improve air circulation; repeat every 5–7 days for 3 treatments
Keep coryphantha vivipara pest-free
Healthy plants resist pests best. Get the basics right:
Coryphantha vivipara pests — FAQ
What is eating my coryphantha vivipara?
Coryphantha vivipara (spinystar cactus) grown as a houseplant or in an outdoor rock garden is susceptible to mealybugs sheltering in its dense areoles and to root rot in poorly drained soils. Spider mites can appear indoors. Outdoors in its native range it may attract beetles or ants farming aphids, though this is uncommon in cultivation.
How do I get rid of mealybugs on coryphantha vivipara?
White cottony clumps among areoles and around the tubercle bases; sticky honeydew; weakened, shrivelled plant Remove with isopropyl alcohol on a cotton swab; spray neem oil; quarantine plant and repeat weekly until clean
How do I get rid of root mealybugs on coryphantha vivipara?
Poor growth and wilting with white waxy powder on roots discovered on unpotting Remove all old soil, soak roots in systemic insecticide solution, dry and replant in fresh sterile cactus mix
How do I get rid of spider mites on coryphantha vivipara?
Stippled or bronzed patches on the cactus body; fine webbing in dry indoor conditions Spray with insecticidal soap or dilute neem oil; improve air circulation; repeat every 5–7 days for 3 treatments