Author
Aradhana Devi Deesh
aradhana.deesh@gmail.com
Ministry of Agriculture & Waterways
Suva
Coauthors
Makereta Ranadi, Ministry of Agriculture & Waterways, Suva, Fiji
Asma Bibi, Ministry of Agriculture & Waterways, Suva, Fiji
Takala Talacakau, Ministry of Agriculture & Waterways, Suva, Fiji
Abstract
Classical weed biocontrol in the Pacific, initiated in 1911, is a critical tool for safeguarding agriculture and native ecosystems. Fiji, the region’s most active practitioner, has released 30 agents against 11 weed species. This approach has delivered durable, cost-effective control, reducing reliance on herbicides. Notable successes include the establishment of agents like Calligrapha pantherina (Sida acuta), Puccinia spegazzinii (Mikania micrantha), Liothrips urichi (Clidemia hirta), and Uroplata girardi (Lantana camara), which have caused significant weed suppression. While other agents have established, their impacts have been less pronounced or are still under evaluation. Current research targets the invasive African tulip tree (Spathodea campanulata) with agents Colomerus spathodeae (gall mite) and Paradibolia coerulea (leaf-feeding beetle), including host-specificity testing in Biosecurity Approved Premises. This programme reflects strengthened institutional capacity and the value of international partnerships. Looking ahead, the future efficacy of biocontrol in Fiji depends on sustained investment in key infrastructure particularly quarantine and diagnostic facilities, robust post-release surveillance, and the integration of biocontrol into broader Integrated Weed Management strategies. By combining scientific rigour, regulatory safeguards and local knowledge, Fiji’s programme exemplifies a sustainable pathway for managing invasive weeds across the Pacific islands.
keywords
Weed
Biocontrol
Sustainability
Establishment
Fiji
Highlights
Fiji’s biocontrol with proven, sustainable success against major weeds.
New African tulip biocontrol project showcases modern, safe biocontrol protocols.
Future success hinges on investment in infrastructure and integrated strategies.