CRB are capable of killing all palm species and have been found to attack banana, taro, pineapple and sugarcane. The grubs live exclusively in decaying plant material such as green waste, mulch, compost and manure. Residents on the entire island of Oahu are urged not to move any green waste or mulch from any location as CRB do not move long distances on its own, but may be transported by humans. Oahu residents are also asked to inspect their mulch piles periodically for CRB larvae and adults.