Restricted distribution. Hosts are the nettle family (Bohmeria species). Ramie is a fibre crop, also used as fodder. In Fiji, on overripe bananas.
Larvae defoliate plants, stripping leaves to the veins. Large, up to 10 cm, black and yellow with long white hairs. Moth has blue patterns on hindwings.
Cultural control: avoid over overlapping crops, and planting new crops nest to old; leave 3 months between crops; monitor x2 weekly, and consider hand picking (rather than insecticides); collect and burn crop remains after harvest.
Chemical control: use botanicals to safeguard natural enemies (chillies, neem, derris, pyrethrum); in commercial plots, use microbials [spinosad, Bt (Bacillus thuringiensis subspecies kurstaki)] sprays against caterpillars when young. Avoid pyrethroids and organophosphates.