Entoma
Rhododendron leafhopper, Graphocephala fennahi, plate

Leafhoppers

Graphocephala fennahi

Rhododendron leafhopper

Females lay eggs in rhododendron flower buds each autumn, and the wounds may let in a fungus that kills the bud, though the link stays debated.

WhereGardens and parks with rhododendron or azalea
Size8 to 10 mm body length
WhenJune to October

Adults have a bluish-green body crossed by two orange stripes, with a pale yellow head and a dark band between the eyes. Nymphs are wingless, creamy white, and live on the undersides of leaves.

Both nymphs and adults feed only on rhododendron and azalea sap. Eggs laid in flower buds in late summer and autumn overwinter and hatch the following spring, and the egg laying wounds are suspected, though not proven, to let in the fungus that causes bud blast.

Traits

Habitat

Garden

Colour

Green, Orange, Yellow

Active

Day

To people

Harmless to people; sap feeding and confined entirely to rhododendron and azalea plants.

Activity through the year

Often confused with

Green leafhopperOpen entry ›
Cicadella viridis

Slightly smaller, about 6 to 9 mm, with a bicoloured yellow and green pronotum and no orange stripes, and found in damp grassland rather than on rhododendron.

Questions

Is the Rhododendron leafhopper dangerous to people?

Harmless to people; sap feeding and confined entirely to rhododendron and azalea plants.

When can you see the Rhododendron leafhopper?

The Rhododendron leafhopper can be seen from June to October, by day.

Plate retouched from a museum specimen photo by Lilian Cooper, Taxon Expeditions, CC0, GBIF Licence

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True bugs›Leafhoppers›Graphocephala

Last updated 2026-09-26. Every entry is checked against published sources.