Description and biological parameters of Ooencyrtus isabellae Guerrieri and Noyes sp. nov. (Hymenoptera: Chalcidoidea: Encyrtidae), a potential biocontrol agent of Zophiuma butawengi (Heller) (Hemiptera: Fulgoromorpha: Lophopidae) in Papua New Guinea

The planthopper Zophiuma butawengi (Heller) (= Z. lobulata Ghauri) is a seriouspest of coconut and oil palm in Papua New Guinea, causing palm decay known as Finschhafen disorder. Recently, two dominant species of parasitoids emerged from egg masses of this pest, namely Parastethynium maxwelli (Girault) (Hymenoptera:Mymaridae) and an undescribed species of Ooencyrtus Ashmead (Hymenoptera:Encyrtidae). The latter species, here described, appears to be a potential biocontrolagent of Z. butawengi especially in the New Britain Province of Papua New Guinea.Biological features of the new species, i.e. development time and adult longevity,were also calculated to give information that could help in its use in biologicalcontrol programmes.