Pest identification
What's eating my sea hibiscus?
Scale insects (soft and armored)
Signs: Brown or tan immobile bumps cemented to stems and branches; insects suck phloem sap, causing yellowing leaves, dieback of branches, and heavy honeydew deposits.
Control: Scrub light infestations with a soft brush dipped in soapy water. Apply horticultural oil (summer weight) to smother all life stages; coat stems thoroughly. Repeat in 2–3 weeks.
Whitefly
Signs: Adults cloud up from leaf undersides when disturbed; nymphs feed on undersides causing stippled, yellowing leaves and sticky honeydew that hosts sooty mold.
Control: Spray leaf undersides with insecticidal soap or neem oil every 5–7 days for 3–4 applications. Yellow sticky traps help monitor and reduce adult populations.
Mealybugs
Signs: White waxy cottony masses in leaf axils and along woody stems; sap-feeding causes distorted new growth and a persistent sticky residue.
Control: Dab small colonies with isopropyl alcohol on a cotton swab. For larger infestations spray neem oil or insecticidal soap, paying attention to stem joints. Repeat weekly for a month.
Keep sea hibiscus pest-free
Healthy plants resist pests best. Get the basics right:
Sea Hibiscus pests — FAQ
What is eating my sea hibiscus?
Sea Hibiscus, a large tropical tree-shrub in coastal and subtropical gardens, faces whitefly, scale insects, and mealybugs as its main pests. Scale is especially problematic on mature stems. Aphids sometimes colonize new shoots. Treat scale with horticultural oil, whitefly with insecticidal soap, and mealybugs with alcohol swabs on small infestations.
How do I get rid of scale insects (soft and armored) on sea hibiscus?
Brown or tan immobile bumps cemented to stems and branches; insects suck phloem sap, causing yellowing leaves, dieback of branches, and heavy honeydew deposits. Scrub light infestations with a soft brush dipped in soapy water. Apply horticultural oil (summer weight) to smother all life stages; coat stems thoroughly. Repeat in 2–3 weeks.
How do I get rid of whitefly on sea hibiscus?
Adults cloud up from leaf undersides when disturbed; nymphs feed on undersides causing stippled, yellowing leaves and sticky honeydew that hosts sooty mold. Spray leaf undersides with insecticidal soap or neem oil every 5–7 days for 3–4 applications. Yellow sticky traps help monitor and reduce adult populations.
How do I get rid of mealybugs on sea hibiscus?
White waxy cottony masses in leaf axils and along woody stems; sap-feeding causes distorted new growth and a persistent sticky residue. Dab small colonies with isopropyl alcohol on a cotton swab. For larger infestations spray neem oil or insecticidal soap, paying attention to stem joints. Repeat weekly for a month.