Parasitic Wasp to the Rescue?

Wilkin's bunting is an extremely rare bird. It's only found on Nightingale Island, which is part of the Tristan da Cunha archipelago. Nightingale island's only native tree is Phylica arborea and the bunting feeds on its fruit. Humans, however, have inadvertently introduced a sap-suckling scale insect to the island. This scale insect secretes 'honeydew', as it feeds on the trees. That honeydew encourages the growth of a sooty mould, that first weakens and then kills the tree. Consequently, this scale insect could destroy Nightingale Island's forest and drive Wilkin's bunting to extinction (https://www.theguardian.com/environment/2024/oct/08/tiny-parasitic-wasp-rarest-species-bird-extinction-wilkins-bunting). The RSPB; the Centre for Agriculture and Biosciences International; the UK Food and Environment Agency and Tristan da Cunha's government have collectively launched a number of schemes to conserve Wilkin's bunting. They've introduced a tiny parasitoid wasp that prevents the scale insects breeding. The numbers of trees have been boosted by nursery growing. Nightingale Island's biosecurity has also been improved to limit further introductions of alien species. The schemes appear to be working as the numbers of Phylica arborea and Wilkin's bunting are both increasing. The wasp should die out, if the scale insects are eradicated.