Eleven to 15 weeks later, they enter the pupal stage and are immobile for approximately six weeks. Eggs hatch in 11 days, and larvae begin feeding on surrounding organic material. Life Cycle: Adult females deposit eggs inside dead palms, decaying plant material, soil with high organic matter content, and, occasionally, wooden structures. Initially oval I shape, but swell as larvae develop. Larvae: Milky white with red heads, C-shaped, has three pairs of segmented legs and, over 3 instars, grow to 100 mm in length.Įggs: Yellowish-white usually 3mm in diameter. Hosts: Many species of palm, including Coconut, Sago, Betel, Royal, Oil and Ornamental Palms, as well as rotting material on plants like Breadfruit and Mangoĭescription: Adults: Reach 30-63 mm in length and are dark brown or black Both males and females possess a similarly sized horn used for leverage when moving within tightly-packed leaves or within the cavities they create in the crown of palms, the horn length is longer on average for males. Check with Cooperative Extension or Master Gardener for local information and recommendations.Ĭultural and Physical Control: Managing the coconut rhinoceros beetle involves removing or destroying organic material that supports larval development such as decaying logs and stumps, removing dead palms, and removing piles of leaves and grass.ĭistribution: Asia (between India and Indonesia), spread to Yemen, Reunion Islands, and Hawaii
Traps should be checked weekly or more frequently, depending on pest population.
Traps should be placed near the highest point of the plant.
For larger fields (10 acres or greater) use 1-2 traps per five acres. A minimum of two traps should also be used for fields of uneven topography. Monitoring Strategy: In smaller fields, use one trap every 1 to 1 ½ acre. Lure Active Ingredient: Ethyl-4-methyloctanoate
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