Pest identification
What's eating my giant chalk dudleya?
Mealybugs
Signs: White cottony clusters in leaf crevices and at the stem base; sap loss causes limp, discoloured outer leaves
Control: Use an alcohol-dipped cotton swab to remove bugs without disturbing the chalk coating; apply insecticidal soap to stems only; repeat weekly
Aphids
Signs: Small soft insects clustered on emerging flower stalks; honeydew residue and distorted buds are common signs
Control: Hand-remove or rinse stalks carefully with soapy water; avoid wetting the main rosette leaves to preserve the farina; apply neem oil to stalks only
Scale insects
Signs: Hard brown bumps adhering to stems and leaf edges; prolonged infestation stunts growth and causes yellowing
Control: Scrape off with a soft brush; treat with 70% isopropyl alcohol on a cotton swab; follow up with neem oil spray on stems every 10 days
Keep giant chalk dudleya pest-free
Healthy plants resist pests best. Get the basics right:
- What eats giant chalk dudleya — the species this cultivar belongs to
- What eats giant chalk dudleya — our other guide for the same plant
- What's wrong with my plant? — the diagnosis apps compared
- Common giant chalk dudleya problems & fixes
- Giant Chalk Dudleya watering schedule
- Giant Chalk Dudleya light requirements
- Full giant chalk dudleya care guide
Giant Chalk Dudleya pests — FAQ
What is eating my giant chalk dudleya?
Giant Chalk Dudleya is a striking California native grown as a houseplant outside its native range. Mealybugs are the primary indoor threat, hiding between the broad powdery leaves. Aphids target emerging flower stalks. The chalky farina coating is easily damaged — avoid spraying water directly on leaves; apply treatments only to stems and soil.
How do I get rid of mealybugs on giant chalk dudleya?
White cottony clusters in leaf crevices and at the stem base; sap loss causes limp, discoloured outer leaves Use an alcohol-dipped cotton swab to remove bugs without disturbing the chalk coating; apply insecticidal soap to stems only; repeat weekly
How do I get rid of aphids on giant chalk dudleya?
Small soft insects clustered on emerging flower stalks; honeydew residue and distorted buds are common signs Hand-remove or rinse stalks carefully with soapy water; avoid wetting the main rosette leaves to preserve the farina; apply neem oil to stalks only
How do I get rid of scale insects on giant chalk dudleya?
Hard brown bumps adhering to stems and leaf edges; prolonged infestation stunts growth and causes yellowing Scrape off with a soft brush; treat with 70% isopropyl alcohol on a cotton swab; follow up with neem oil spray on stems every 10 days