Prospects for the biological control of tutsan (Hypericum androsaemum L.) in New Zealand.

The feasibility for biological control of tutsan, Hypericum androsaemum L., in New Zealand (NZ) was assessed. Conventional control methods are impractical and tutsan is not valued by any groups of society. It therefore makes a potentially good candidate for biological control. However, the lack of information about potential agents and the existence of four indigenous Hypericum spp. in NZ, including two endemics, are likely to prove challenging.