Abstract
AbstractThe biology of the leafhoppers Eurymeloides punctata and Eurymela distincta was studied from December 1986 to June 1988 on CSIRO experimental eucalypt plantations near Canberra. These eurymelids are sap‐feeders on eucalypts and are attended by ants. E. punctata had three overlapping generations per year and overwintered mainly in the egg stage. Populations generally were restricted to small trees of Eucalyptus viminalis Labill. less than 3 years old and as these grew there was a progressive movement onto younger trees in the plantation. E. distincta had one generation per year and overwintered as adults. It occurred on larger trees in the plantation and also on mature eucalypts in the woodland surrounding the plantation. Eggs of each species were parasitised by different species of mymarid wasp. Nymphs of both species were parasitised by a dryinid wasp (Anteon sp.). Egg parasitisation was the main cause of mortality in E. punctata and mortality of early instars was higher than that of late instars.
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