The Assistant Plant Health Officer, Bill Garae, made the urgent call as Biosecurity Vanuatu confirmed the Coconut Rhinoceros Beetle pest has reached Port Vila.
Garae said authorities face a real struggle trying to ensure the pest doesn't spread around the country.
He said ships leaving Port Vila at night will more easily spread the beetle to other islands of Vanuatu.
He has also called on residents in the capital to clean their backyards and destroy possible breeding sites for the beetle.