The public broadcaster reported the beetle was sighted last year by farmers who feared the pest would kill coconut plantations and set back copra production.
A spokesman for the Ward Eight Farmers Association Samson Eric Lifuasi said authorities needed to support control measures and to formulate a plan to stop the beetle spreading to other provinces.
Last year, the Australian company Kokonut Pacific reported a renewed infestation of rhinoceros beetle in the Solomons was killing large palm trees.