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Biological control of introduced weeds in the 22 Pacific Island countries and territories (PICTs) began in 1911, with the lantana seed feeding fly introduced into Fiji and New Caledonia form Hawaii. To date, a total of 62 agents have been deliberately introduced into the PICTs to control 21 weed species in 17 countries.

Mangrove is a type of forest growing along tidal mudflats and along shallow water coastal areas extending inland along rivers, streams and their tributaries where the water is generally brackish. The mangrove ecosystem is dominated by mangrove trees as the primary producer interacting with associated aquatic fauna, social and physical factors of the coastal environment.