Hawaiʻi Board of Agriculture and Biosecurity on July 28 approved an expansion to the designated coconut rhinoceros beetle-infested area in West Hawaiʻi. New expansion of coconut rhinoceros beetle-infested area in West Hawaiʻi. A request to include the new area was made following the initial March 24 designation of the West Hawaiʻi infested area. An adult coconut rhinoceros beetle. Click here for a coy of Interim Rule 26-1, which established the coconut rhinoceros beetle-infested area on the west side of the island.