Troubleshooting
Expanded Lobster Claw problems — and how to fix them
Expanded Lobster Claw (Heliconia latispatha) is generally forgiving once you match its basics, but a few issues come up again and again. Here is what each one looks like, why it happens, and the fix.
Rust thrips (Chaetanaphothrips orchidii)
The most common insect pest; feeds within developing inflorescences and along leaf veins, causing silvery streaking of leaf tissue and distorted, bronzed bracts. Control with insecticidal soap or spinosad-based products applied early in the infestation.
Rhizome rot (Pythium / Phytophthora spp.)
Occurs in poorly drained or consistently waterlogged soil; presents as yellowing pseudostems that will not respond to watering. Remove and destroy affected rhizome sections and improve drainage before replanting.
Cercospora leaf spot
Circular brown or black lesions with yellow halos appear during prolonged periods of high leaf wetness. Improve airflow around plants and avoid overhead irrigation; copper-based fungicides provide control.
Prevent expanded lobster claw problems before they start
Most expanded lobster claw issues are care-mismatch, not bad luck. Dial in the basics:
Expanded Lobster Claw problems — FAQ
Why is my expanded lobster claw rust thrips (chaetanaphothrips orchidii)?
The most common insect pest; feeds within developing inflorescences and along leaf veins, causing silvery streaking of leaf tissue and distorted, bronzed bracts. Control with insecticidal soap or spinosad-based products applied early in the infestation.
Why is my expanded lobster claw rhizome rot (pythium / phytophthora spp.)?
Occurs in poorly drained or consistently waterlogged soil; presents as yellowing pseudostems that will not respond to watering. Remove and destroy affected rhizome sections and improve drainage before replanting.
Why is my expanded lobster claw cercospora leaf spot?
Circular brown or black lesions with yellow halos appear during prolonged periods of high leaf wetness. Improve airflow around plants and avoid overhead irrigation; copper-based fungicides provide control.