Narrow distribution. Indonesia, Oceania. On taro, seedlings of oil palm and coconut, giant taro, banana, giant swamp taro, sugarcane, Pandanus. An important pest.
Adult beetles do the damage by boring into the corm. Males are first to arrive awaiting females. After mating, females leave to lay eggs in organic matter.
Worse where forest disturbed by logging or cyclones.
Cultural control: destruction of breeding sites suggested, but difficult to find; alternatively, grow a legume cover crops, e.g., Mucuna, Pueraria, Glycine, slash (or use herbicide) to kill it, and then plant taro into the mulch.
Chemical control: imidacloprid or the pyrethroid cypermethrin at planting, and 3 months.