Abstract
Transmission of lethal yellowing disease was tested by collecting leafhoppers from undergrowth, confining them for up to four days on diseased palm fronds, and transferring them to test palms after a minimum ten day incubation period on alternative herbaceous hosts. Species tested were Chlorotettix minimus, C. viridius, C. nigromaculatus, Graminella spp., Hortensia similis, Poeciloscarta histrio, Protalebrella braziliensis and Sanctanus fasciatus. In additional laboratory tests, C. minimus, C. viridius, Spangbergiella vulnerata and the planthopper, Haplaxius crudus, were injected with extracts from diseased plants followed by similar incubation and transmission techniques. No transmissions were noted.
