In the mangrove ecosystem, the major pests can degrade forest quality, even cause forest death. In order to determine the major pests and the level of damage to the mangrove ecosystem, the study conducted an investigation on the "Composition of major pests in the mangrove ecosystem of Ha Tinh province". The methods used in the study include: Investigation of the composition of major pests
identification of species names
identification of major pests
data processing and analysis. The initial results of the study recorded the composition of major pests, according to which there are 18 major pests belonging to 15 genera, 13 families in 7 orders, of which the Lepidoptera is the most diverse with 6 species (accounting for 33.3% of the total number of species), belonging to 6 genera and in 5 families (accounting for 38.5% of the total number of families). The study also identified 5 main harmful crustacean species belonging to 3 genera (Balanus
Metopograpsus
Sphaeroma), 3 families (Balanidae
Grapsidae
Sphaeromatidae) and 3 orders (Cirripedia, Decapoda, Isopoda). On that basis, it forms a scientific basis for preventing and controlling the decline in area and quality of mangrove forests.