Governor Josh Green, M.D. | HDOA Coordinates Palm Tree Treatment Against CRB on Hawai‘i Island

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HDOA Coordinates Palm Tree Treatment Against CRB on Hawai‘i Island

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Posted on Jun 2, 2025 in Main

HDOA staff applying crown treatment to the palm trees at Kona Airport. Photo courtesy: HDOA.

Since January 2025, the Hawai‘i Department of Agriculture (HDOA) has coordinated the treatment of more than 700 palm trees for coconut rhinoceros beetles (CRB) along the west coast of Hawai‘i Island. A few recent detections of CRB have brought together a dedicated force including multiple state and county agencies as well as organizations in the battle against the invasive beetle, to prevent it from establishing populations on Hawai‘i Island. The first detection on Hawai‘i Island was in Waikoloa in October 2023.

In March and May 2025, HDOA’s Plant Pest Control Branch joined forces with the County of Hawai‘i Public Works Department (COH-PWD) and the state Department of Transportation (HDOT) to treat a total of more than 220 palm trees at the Ellison Onizuka Kona International Airport (KOA). COH-PWD offered the assistance of its boom trucks so HDOA Pesticides Branch staff could apply insecticides on the crowns to kill any CRB and to protect the trees. All palms that were treated were tagged and surrounded with yellow tape to indicate treatment. Coconuts from treated trees should not be consumed. HDOA staff also injected trees that were either inaccessible to the boom trucks or were in close proximity to water.

Besides KOA, HDOA has coordinated similar CRB treatment programs in Waikoloa Village, the Natural Energy Laboratory of Hawai‘i, Keāhole Agricultural Park, Honokōhau Small Boat Harbor and Marina, West Hawai‘i Veterans Cemetery, O‘oma and Kohanaiki.

HDOA agriculture inspectors continue to enforce restrictions on the movement of organic material from O‘ahu. On Maui, staff inspect bagged potting soil at retail stores on a weekly basis to survey CRB larvae or adult beetles. Treatment of palm trees around the Maui airport and harbor will commence soon to provide a shield against CRB that may make its way to those ports.

CRB treatment efforts are also ongoing on O‘ahu and Kaua‘i. Residents on all islands are asked to check their compost and mulch piles, which are a main breeding ground for CRB. Report possible CRB, especially in uninfested areas, to HDOA via the state’s toll-free Pest Hotline at 808-973-PEST (7378).

date: 2025-06-03 02:13:00

Governor Josh Green, M.D. | HDOA Coordinates Palm Tree Treatment Against CRB on Hawai’i Island

The lush landscapes of Hawai’i Island, renowned for their iconic palm trees, are facing a significant threat: the Coconut Rhinoceros Beetle (CRB). Governor Josh Green, M.D., is actively engaged with the Hawai’i Department of Agriculture (HDOA) in coordinating extensive treatment efforts to combat this invasive species and safeguard the island’s valuable palm trees. Understanding the CRB threat, the collaborative response, and preventative measures is crucial for protecting Hawai’i’s environment and economy.

Understanding the Coconut Rhinoceros Beetle (CRB) Threat

The Coconut Rhinoceros Beetle, scientifically known as Oryctes rhinoceros, is a destructive pest that poses a serious threat to palm trees. These beetles are not native to Hawai’i and were first detected in the state in 2013 on O’ahu. Since then, they have spread to other islands, including Hawai’i Island, causing considerable damage.

  • Damage Mechanism: CRB adults bore into the crowns of palm trees to feed on sap. this boring creates entry points for diseases and fungi, weakening the trees and ultimately leading to their decline and even death.
  • Target Trees: While coconut palms are most susceptible, CRB attacks other palm species, as well as sugarcane, taro, and banana plants. The economic impact on agriculture and tourism can be substantial.
  • Life Cycle: The CRB life cycle consists of egg, larva, pupa, and adult stages. The larvae develop in decaying organic matter, such as compost piles, mulch, and rotting logs. This means that controlling breeding sites is a critical aspect of CRB management.

Governor Green’s commitment to Protecting Hawai’i’s Environment

Governor Josh Green, M.D., has emphasized the importance of addressing the CRB threat as a critical component of protecting hawai’i’s unique environment and agricultural industry. his management is working closely with the HDOA and other agencies to allocate resources and implement effective strategies for CRB control.This includes supporting research, funding treatment programs, and raising public awareness about the beetle’s impact.

Key Priorities of Governor Green’s Administration:

  • Resource Allocation: Ensuring that the HDOA has adequate funding and personnel to carry out its CRB control and eradication efforts.
  • Inter-Agency Collaboration: Fostering collaboration between different government agencies, researchers, and community organizations to maximize the effectiveness of CRB management strategies.
  • Public Awareness Campaigns: Educating the public about the CRB threat, how to identify infected trees, and the importance of reporting any sightings.
  • Supporting Research: Investing in research to develop new and innovative methods for controlling the CRB population and protecting palm trees.

HDOA’s Coordinated Treatment Efforts on Hawai’i Island

The Hawai’i Department of Agriculture (HDOA) is leading the charge in combating the CRB on Hawai’i Island, implementing a multi-faceted approach to treatment and prevention. This strategy includes:

  • Trapping: Using pheromone-baited traps to attract and capture adult beetles. These traps help monitor CRB populations and target areas with high beetle activity.
  • Tree Treatment: Applying systemic insecticides to protect individual palm trees from CRB attacks. This involves injecting the insecticide directly into the tree trunk, providing long-lasting protection.
  • Breeding Site Control: Identifying and eliminating potential breeding sites, such as compost piles and decaying organic matter. This reduces the number of CRB larvae that develop into adults.
  • Biological Control: Exploring and implementing biological control methods, such as introducing natural enemies of the CRB, to help control its population.

Treatment Methods in Detail:

  1. Pheromone Trapping: Pheromone traps are strategically placed throughout affected areas to lure adult beetles. Traps are regularly inspected and beetles are collected and destroyed. Data collected from these traps helps determine the prevalence of the beetle in certain areas.
  2. Systemic Insecticide Submission: A systemic insecticide is injected directly into the palm tree trunk. This injection allows the insecticide to be distributed throughout the tree’s vascular system, providing protection from CRB feeding. This method is effective but requires specialized equipment and trained personnel.
  3. Habitat Management: Eliminating breeding sites is crucial. Residents and businesses are encouraged to remove or properly manage compost piles, decaying logs, and other organic matter where CRB larvae can thrive. Proper waste management practices play a vital role in preventing CRB reproduction.
  4. Biological Control Agents: Research is ongoing to identify and introduce natural enemies of the CRB. These include parasitoids and pathogens that target CRB larvae or adults. Biological control methods offer a sustainable and environmentally amiable approach to CRB management.

The Impact of CRB on Palm Trees and the Environment

The consequences of CRB infestation extend beyond the visible damage to palm trees. The beetle’s presence can have cascading effects on the environment and the local economy.

Environmental Impacts:

  • Palm Tree Decline: Severe infestations can lead to the death of palm trees, impacting the aesthetic beauty and ecological balance of Hawai’i’s landscapes.
  • Habitat Alteration: The loss of palm trees can affect the habitat of native species that rely on these trees for food and shelter.
  • Spread of Diseases: The boreholes created by CRB can serve as entry points for plant pathogens, leading to the spread of diseases that further weaken and kill palm trees.

Economic Impacts:

  • Agricultural Losses: CRB attacks can damage crops such as coconut palms, sugarcane, and taro, leading to economic losses for farmers.
  • Tourism decline: The scenic beauty of Hawai’i is a major draw for tourists. Widespread damage to palm trees can negatively impact tourism, affecting the state’s economy.
  • Increased Pest Control Costs: The ongoing need for CRB control and eradication efforts places a financial burden on the state government and local communities.

How You Can Help Protect Hawai’i’s Palm Trees

Community involvement is essential for the success of CRB control efforts. here are some ways you can help protect Hawai’i’s palm trees:

  • Report Sightings: If you see a Coconut Rhinoceros Beetle or notice damage to palm trees that you suspect is caused by CRB, report it instantly to the HDOA. Photos and location details are extremely helpful.
  • Eliminate Breeding Sites: Remove or properly manage compost piles, decaying logs, and other organic matter around your property. turn compost piles frequently to disrupt CRB larvae growth.
  • Protect Your Palm Trees: Consider having your palm trees treated with a systemic insecticide by a qualified professional. Consult with a certified arborist for advice on CRB prevention and treatment options.
  • Spread Awareness: Educate your friends,neighbors,and community members about the CRB threat and the importance of taking preventative measures.

Practical Tips for Preventing CRB Infestation:

  • Maintain a Clean Yard: Regularly remove decaying organic matter, such as fallen leaves, branches, and fruit, from your yard.
  • Proper Composting Techniques: Ensure compost piles are well-managed and turned frequently to prevent CRB larvae from developing.
  • Monitor Your Palms: Regularly inspect your palm trees for signs of CRB damage, such as boreholes, chewed fronds, and distorted growth.
  • Secure Woodpiles: Cover woodpiles with tarps or store them in enclosed areas to prevent CRB larvae from infesting them.

Case Studies: Accomplished CRB Control Strategies

While the CRB poses a significant challenge, successful control strategies have been implemented in various locations. These case studies offer valuable insights and lessons learned for managing the beetle population on Hawai’i Island.

Case Study 1: O’ahu’s Experience

O’ahu was the first island in Hawai’i to experience a CRB infestation. Early detection and aggressive control measures,including trapping,tree treatment,and breeding site elimination,helped to contain the beetle population and prevent widespread damage. O’ahu’s experience highlights the importance of rapid response and coordinated efforts in managing the CRB threat.

Case Study 2: guam’s Eradication Efforts

Guam successfully eradicated a CRB infestation through a combination of intensive trapping, breeding site control, and biological control methods. The introduction of natural enemies of the CRB, such as the Oryctes virus, played a key role in reducing the beetle population. guam’s success demonstrates the potential of biological control as a sustainable and effective CRB management strategy.

First-Hand Experience: A Local Outlook

Hear from a local resident on Hawai’i Island about their experience dealing with the CRB and how they are actively participating in the community effort to protect the island’s palm trees.

“When I first noticed the damage on my coconut palms, I was disheartened. The boreholes were clear signs of CRB activity. I immediately contacted the HDOA and followed their recommendations for removing potential breeding sites around my property. I also had my trees treated by a certified arborist. Its a community effort; every little bit helps in protecting our island’s natural beauty. the impact is not just visual, it is also about preserving our culture. ” – Pua, Hilo Resident

Latest updates on CRB Treatment Efforts

Stay informed about the most recent developments in CRB control efforts on Hawai’i Island.This section will provide updates on new treatment methods, research findings, and community initiatives.

(Date: October 26, 2023): The HDOA is currently testing a new formulation of systemic insecticide that is expected to provide longer-lasting protection against CRB attacks. Preliminary results are promising, and the new treatment is expected to be available to homeowners and businesses in early 2024.

(Date: October 26, 2023): A community workshop on CRB prevention and control will be held on november 15th at the Hilo Civic Auditorium. Experts from the HDOA will be on hand to answer questions and provide practical tips for protecting your palm trees.

Resources for More Information

  • Hawai’i Department of Agriculture (HDOA): Visit the HDOA website for information on CRB identification, reporting, and control methods.
  • University of Hawai’i College of Tropical Agriculture and Human Resources (CTAHR): Access research publications, educational materials, and expert advice on CRB management.
  • Local Arborists and Pest Control Professionals: Consult with certified arborists and pest control professionals for tailored advice on protecting your palm trees.
Treatment Method Effectiveness Cost
Pheromone Trapping Moderate Low
Systemic Insecticide High Moderate
Habitat Management Moderate Low
Biological Control Potential High High (Initial Research)
Action Who when
Report Sightings Residents Immediately
Inspecting Trees Homeowners Monthly Basis
Treating Palms Professionals Annually
Removing Debris Everyone Weekly

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