Biological control of parrot’s feather in North America
Parrot feather, Myriophyllum aquaticum, is a very popular garden and ornamental plant and has a long history of invasion worldwide. It was first recorded in Canada in 1980 from British Columbia and has since been recorded in the Lower Mainland and in the USA. Parrot feather forms dense impenetrable mats which affect stream flow, resulting in reduced native species’ richness at local scales, reduced water quality and habitat quality for fish and wildlife, and impacts on human activities. Due to the negative impacts, management of this species is required and a sustainable option is biological control. A biological control programme against parrot feather is already well-developed in South Africa and this project aims to investigate the potential for use in Canada.
Managing the pathogens threatening St Helena’s biodiversity and food security
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.
Repelling the invader: turning the tide on Ascension’s Mexican thorn
Mexican thorn is the most damaging invasive species on Ascension Island. Introduced purposely, this weed has naturalised and spread rapidly, outcompeting native vegetation and negatively impacting wildlife, while encouraging other invasive rodents. This project will take a strategic and integrated approach to controlling thorn on Ascension including a rigorous assessment of further biocontrol and improved chemical and mechanical treatment. The project will ensure local capacity is built to deliver those most appropriate and cost-effective for Ascension. The outcome will be a step-change in our ability to control Mexican thorn and result in a long-term contraction of its range and restoration of habitats.