Insect populations that grow to plague proportions when introduced to new areas can often be remedied by biological control. This project sought to control populations of fruit-piercing moth and passionfruit white scale that were destroying fruit crops in Samoa. Scientists tested and found effective a parasitising wasp that brought the scale under control in less than two years. Control of the fruit-piercing moth centred on identifying suitable control agents in PNG, from where the moth originates, and testing them on populations in Samoa as well as Fiji and Tonga.