The host range of B. longissima includes various Palmae [Arecaceae]. In Papua New Guinea, coconut, sago palms, areca or betel palm (Areca catechu), royal palms (Roystonea regia), oil palm and ornamental palms are attacked. In northern Australia, hosts include areca palms (A. catechu), nicobar palm (Bentinckia nicobarica), carpentaria palm (Carpentaria acuminata) and fish tail palm (Caryota mitis). In Hong Kong, it is also reported from ivory nut palm (Phytelephas), petticoat palm (Washingtonia robusta), king palm (Archontophoenix alexandrae) and dwarf date palm (Phoenix roebelenii) (CSK Lau, Agriculture and Fisheries Department, Hong Kong, personal communication, 1992).
Adult observed on the leaf
B. longissima was detected for the first time in Hong Kong in 1988 infesting 30 petticoat palms in a nursery (Lau, 1991). Recently, B. longissima has spread to Singapore, Vietnam, Nauru, Cambodia, Laos, Thailand, Maldives, Myanmar and Hainan Island, China (Rethinam and Singh, 2007). It has the potential to spread from the Maldives to Sri Lanka and southern parts of India.
A surgical method of control has been attempted in the Solomon Islands; this involved cutting out and destroying the central unopened frond which harbours the pest (Brown and Green, 1958). This procedure must be conducted over a large area at one time to reduce re-infestation from neighbouring palms and must be repeated fairly often to be effective. Palms which were 3-6 years old could stand the loss of one leaf every 6 months, but younger palms could not as this caused too great a reduction in growth rate (Tothill, 1929).Chemical Control