Pest identification
What's eating my tephrocactus?
Mealybugs
Signs: White waxy fluff at segment joints and the crown; segments may yellow and detach prematurely
Control: Treat with 70% isopropyl alcohol swabs at each joint; apply insecticidal soap or neem oil spray; repeat weekly for a month
Root mealybugs
Signs: White powdery coating on roots; plant fails to push new segments and base feels soft or unstable
Control: Unpot carefully, wash roots, allow to dry completely before repotting in fresh sterile gritty mix; systemic drench if needed
Spider mites
Signs: Faint webbing around spine bases; dull and slightly puckered segment surfaces
Control: Rinse segments with water, then spray with neem oil; ensure adequate airflow to prevent recurrence
Keep tephrocactus pest-free
Healthy plants resist pests best. Get the basics right:
Tephrocactus pests — FAQ
What is eating my tephrocactus?
Tephrocactus (Tephrocactus articulatus) is a segmented, papery-spined cactus kept as a houseplant. Its loose, separating segments make root and base inspection straightforward. Mealybugs and root mealybugs are the main threats. Spider mites can attack in dry conditions. The fragile joints mean handling during treatment must be done gently to avoid detaching segments.
How do I get rid of mealybugs on tephrocactus?
White waxy fluff at segment joints and the crown; segments may yellow and detach prematurely Treat with 70% isopropyl alcohol swabs at each joint; apply insecticidal soap or neem oil spray; repeat weekly for a month
How do I get rid of root mealybugs on tephrocactus?
White powdery coating on roots; plant fails to push new segments and base feels soft or unstable Unpot carefully, wash roots, allow to dry completely before repotting in fresh sterile gritty mix; systemic drench if needed
How do I get rid of spider mites on tephrocactus?
Faint webbing around spine bases; dull and slightly puckered segment surfaces Rinse segments with water, then spray with neem oil; ensure adequate airflow to prevent recurrence