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A surveys of homoptera pests on Elaeocarpus sylvestris
Wild dampalsu tree, Elaeocarpus sylvestris is evergreen tree and one of the dominant street trees in Jeju island. Recently, wilting of the wild dampalsu trees by phytoplasma was widely reported but vector of phytoplasma was not found yet. This survey was conducted to find potential vector of the phytoplasma to wild dampalsu tree and we focused on homoptera pests because many phytoplasmas were vectored by homoptera pests. Two sites in Seogwipo, Jeju were selected and then ten trees in each site were selected. The trees were selected by 20 m interval. A rectangular sticky trap was attached to the branch of the tree by a binding string. The traps were changed by a week and the homoptera pests on the traps were counted in the laboratory. Four homoptera pests belonged to Cicadellidae and Psyllidae were found and only two species belonged to Cicadellidae were identified: Batracomorphus mundus and Idiocerus sp. Batracomorphus mundus was the dominant species and it was caught from late May with bimodal peaks. The density was reached up to 87.5 individual/trap. Idiocerus sp. was the second dominant species and it was caught from mid-June with one peak. The density was reached up to 6.6 individual/trap. The two species are examined whether they carry phytoplasma.
