Pest identification
What's eating my euphorbia trigona 'rubra'?
Mealybugs
Signs: Cottony deposits along ribs, spine clusters, and at the soil line; sticky honeydew present
Control: Apply 70% isopropyl alcohol with a cotton swab; treat with neem oil spray every 7–10 days; check the root zone if decline continues
Spider mites
Signs: Fine webbing between spines; leaf-like bracts may drop; stems look dull and dusty
Control: Spray with insecticidal soap; avoid excessively hot, dry air; repeat treatment fortnightly
Root mealybugs
Signs: Unexplained wilting and yellowing despite correct watering; white waxy powder visible at roots when repotting
Control: Unpot, remove soil, rinse roots, treat with a neem soil drench, and repot into fresh, well-draining mix
Keep euphorbia trigona 'rubra' pest-free
Healthy plants resist pests best. Get the basics right:
- What eats african milk tree — the species this cultivar belongs to
- What's wrong with my plant? — the diagnosis apps compared
- Common euphorbia trigona 'rubra' problems & fixes
- Euphorbia Trigona 'Rubra' watering schedule
- Euphorbia Trigona 'Rubra' light requirements
- Full euphorbia trigona 'rubra' care guide
Euphorbia Trigona 'Rubra' pests — FAQ
What is eating my euphorbia trigona 'rubra'?
Euphorbia trigona 'Rubra' is a low-pest houseplant, but mealybugs and spider mites are the most common attackers, hiding along ribs and spine clusters. The milky latex sap deters many chewing insects. Root mealybugs can also appear in dry, compacted soil and go undetected until the plant declines.
How do I get rid of mealybugs on euphorbia trigona 'rubra'?
Cottony deposits along ribs, spine clusters, and at the soil line; sticky honeydew present Apply 70% isopropyl alcohol with a cotton swab; treat with neem oil spray every 7–10 days; check the root zone if decline continues
How do I get rid of spider mites on euphorbia trigona 'rubra'?
Fine webbing between spines; leaf-like bracts may drop; stems look dull and dusty Spray with insecticidal soap; avoid excessively hot, dry air; repeat treatment fortnightly
How do I get rid of root mealybugs on euphorbia trigona 'rubra'?
Unexplained wilting and yellowing despite correct watering; white waxy powder visible at roots when repotting Unpot, remove soil, rinse roots, treat with a neem soil drench, and repot into fresh, well-draining mix