St Helena’s endemic trees and insects are under threat, possibly due to introduced pathogens or changes to the range of endemic pathogens due to climate change. This project will survey and identify pathogens associated with tree death (including nursery-raised stock), and insect populations. Additionally, crop diseases will be surveyed and their management assessed. Methods developed through CABI’s Plantwise initiative will build capacity in diagnostics and management across all sectors, supporting growers, conservationists, and foresters. This will prevent further deterioration of the endemic ecosystem, increase food production and reduce the necessity to import food.