Pest identification
What's eating my dieffenbachia memoria corsii?
Mealybugs
Signs: White powdery masses at leaf axils and stem nodes; yellowing leaves, stunted new growth, and sticky residue.
Control: Remove colonies with an alcohol swab, then spray the entire plant with insecticidal soap or neem oil. Repeat weekly until clear.
Spider mites
Signs: Fine stippling and webbing on leaf undersides, especially in heated indoor rooms with low winter humidity.
Control: Wipe down leaves, mist regularly, and apply neem oil or insecticidal soap spray every 5–7 days for 3 weeks.
Scale insects
Signs: Hard brown bumps fixed to the cane and petioles; leaves turn yellow; honeydew drips onto lower surfaces.
Control: Physically remove scale with a toothbrush, then apply horticultural oil. Follow up monthly and inspect new growth carefully.
Keep dieffenbachia memoria corsii pest-free
Healthy plants resist pests best. Get the basics right:
Dieffenbachia Memoria Corsii pests — FAQ
What is eating my dieffenbachia memoria corsii?
Dieffenbachia 'Memoria Corsii' is a classic indoor houseplant whose mottled grey-green leaves are prone to mealybug infestations on stems and nodes. Spider mites attack in low humidity, and scale insects can colonise the cane over time. Regular inspection of the stem nodes at watering time catches problems before they spread.
How do I get rid of mealybugs on dieffenbachia memoria corsii?
White powdery masses at leaf axils and stem nodes; yellowing leaves, stunted new growth, and sticky residue. Remove colonies with an alcohol swab, then spray the entire plant with insecticidal soap or neem oil. Repeat weekly until clear.
How do I get rid of spider mites on dieffenbachia memoria corsii?
Fine stippling and webbing on leaf undersides, especially in heated indoor rooms with low winter humidity. Wipe down leaves, mist regularly, and apply neem oil or insecticidal soap spray every 5–7 days for 3 weeks.
How do I get rid of scale insects on dieffenbachia memoria corsii?
Hard brown bumps fixed to the cane and petioles; leaves turn yellow; honeydew drips onto lower surfaces. Physically remove scale with a toothbrush, then apply horticultural oil. Follow up monthly and inspect new growth carefully.