NY317 - Biological control of palm leaf beetle

In 1994, the parasitoid Tetrastichus brontispae (Ferriere) was imported from Guam to far north QLD for biological control of the destructive Palm leaf beetle, Brontispa longissima Gestro. T. brontispae was mass cultured and released at 11 sites around Cairns from 1994-95 to establish at two. The parasite also established at one of eight release sites in Cooktown. T. brontispae has shown potential to exert significant control of Palm leaf beetle. However, this study showed the parasite must be established at a greater number of sites for this control to impact on current levels of Palm leaf beetle infestation. Further work is underway.