This research was conducted to confirm the species of longhorn beetle (Coptocercus biguttatus) drilling clove stems in Ambon and part of Ceram Island, Moluccas, which has been noted as an important pest. Aim of this investigation was to characterize the species morphologically, and more detailed with molecular technique via mtCO1 gene analysis. The longhorn beetle was taken in Ambon and part of Ceram Island, Moluccas and then was etablished in laboratory with host rearing method on pieces of clove stem. The results showed that C. biguttatus attacking clove stems in Ambon and part of Ceram Island, Maluku was closely related and grouped into same cluster with C. rubripes and P. semipunctata in of New Zealand with 85% homology value. C. biguttatus distributed evenly in all clove planting areas in Ambon and part of Ceram Island.
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