Pest identification
What's eating my costus woodsonii?
Spider mites
Signs: Leaves develop pale bronze stippling and a dusty, dull sheen; webbing visible between leaves and in leaf sheaths during severe attacks.
Control: Mist foliage and raise humidity; apply insecticidal soap or neem oil spray targeting leaf undersides and sheaths every 5–7 days for 3–4 weeks.
Mealybugs
Signs: White cottony clusters lodged in the overlapping leaf sheaths along the spiralled canes; sap loss causes yellowing and stunted new shoots.
Control: Work isopropyl alcohol swabs into the sheath junctions; follow with neem oil or insecticidal soap spray at 7-day intervals for 4 weeks.
Scale insects
Signs: Hard, brown bumps fixed to the canes and stem nodes; heavy infestations cause yellowing, sticky honeydew deposits, and weakened growth.
Control: Scrape off with a soft brush; apply horticultural or neem oil thoroughly to all cane surfaces; repeat monthly until clear.
Keep costus woodsonii pest-free
Healthy plants resist pests best. Get the basics right:
Costus Woodsonii pests — FAQ
What is eating my costus woodsonii?
Costus woodsonii (Red Button Ginger) is a tropical foliage plant most troubled by spider mites in dry indoor or greenhouse conditions, which damage its large cane-like leaves. Mealybugs colonise the leaf sheaths. Scale can appear on the woody canes. In outdoor tropical cultivation, caterpillars and grasshoppers occasionally chew the foliage.
How do I get rid of spider mites on costus woodsonii?
Leaves develop pale bronze stippling and a dusty, dull sheen; webbing visible between leaves and in leaf sheaths during severe attacks. Mist foliage and raise humidity; apply insecticidal soap or neem oil spray targeting leaf undersides and sheaths every 5–7 days for 3–4 weeks.
How do I get rid of mealybugs on costus woodsonii?
White cottony clusters lodged in the overlapping leaf sheaths along the spiralled canes; sap loss causes yellowing and stunted new shoots. Work isopropyl alcohol swabs into the sheath junctions; follow with neem oil or insecticidal soap spray at 7-day intervals for 4 weeks.
How do I get rid of scale insects on costus woodsonii?
Hard, brown bumps fixed to the canes and stem nodes; heavy infestations cause yellowing, sticky honeydew deposits, and weakened growth. Scrape off with a soft brush; apply horticultural or neem oil thoroughly to all cane surfaces; repeat monthly until clear.