Drone Treatments, Inspections and Surveillance Continue on Maui for Coconut Rhinoceros Beetles

Posted on Apr 10, 2024 in Main

April 10, 2024

Only one palm tree has been found to have CRB on Maui

HONOLULU – In a multi-agency effort, treatments, inspections and surveillance continue on Maui for coconut rhinoceros beetles (CRB). To date, no CRB have been confirmed on Maui since an initial detection of 17 live CRB larvae in one palm tree in Kīhei in November 2023. One dead CRB adult was found at a Maui retail store in September 2023.

During the week of March 25, a second round of pesticide treatments was conducted over a three-day period when 78 palm trees were treated for CRB at a Kīhei golf course and compost facility. The treatment was led by the Maui Plant Pest Control Branch (PPC) of the Hawai‘i Department of Agriculture (HDOA) with the assistance from the Maui Invasive Species Committee (MISC) and its drone and the staff from the University of Hawai‘i-Hilo’s Spatial Data and Visualization Lab, who piloted the drones.

The treatment area was monitored from March 25 to April 8 and no CRB were found. Monitoring will continue weekly for the next few months. Drones have been found to be the most effective and efficient method in treating the crowns of palm trees which can measure up to 90 feet.

The first round of drone treatments in Kīhei was conducted in mid-February 2024, when 24 palm trees were treated. Drone treatments were also conducted on Kaua‘i in October 2023.

HDOA and MISC have surveyed a total of 26,000 palms throughout Maui County and about 80 detection traps have been deployed and are being monitored. So far, no CRB have been detected in those traps.

“It is encouraging that no CRB have been detected on Maui in four months,” said Sharon Hurd, chairperson of the Hawai‘i Board of Agriculture. “However, the department and its partner organizations will continue be vigilant and work to prevent CRB from becoming established in uninfested areas. We encourage the public to be on the lookout for CRB and to check their green waste and compost piles which are notorious breeding grounds.”

HDOA’s Pesticides Branch applied for and received a crisis emergency exemption from the U.S. Environmental Protection Agency (EPA) to treat palms with the pesticide, cypermetherin, which has been found to be effective in killing CRB. The EPA has only authorized its use in the counties of Maui, Kaua‘i and Hawai‘i Island.

In addition to pesticide treatments, HDOA’s Maui Plant Quarantine Branch (PQ) conducts inspections five times a week at the port where interisland barge shipments arrive and conduct outreach and education with port employees. Maui PQ and PPC staff also conduct inspections at Maui big-box retailers at least twice a week or more and inspect bagged propagation material arriving from O‘ahu for possible CRB entry and exit holes. Shipments of mulch, compost and bagged plant propagation material are treated before leaving O‘ahu. Maui staff continue to inspect bulk containers of compost arriving from O‘ahu and are monitoring nurseries, landscaping operations, compost and waste sites and golf courses on a regular basis. On Moloka‘i, inspection and education efforts continue at stores that sell propagative plant material.

Aside from their regular inspection duties, HDOA inspection staff conduct outreach and education activities at landscape companies, vendors of planting materials, and farming and community groups.

On Hawai‘i Island, six live CRB grubs were found in Waikoloa Village in October 2023. A Hawai‘i Island PPC specialist travels weekly from Hilo to Kona to survey for possible CRB infestations with the volunteer assistance of area residents. More than 70 detection traps have been deployed on the east and west sides of the island. To date, no additional CRB have been detected on Hawai‘i Island.

On Kaua‘i, CRB was first detected near Līhu‘e Airport in May 2023. Since then, more than 95 traps have been deployed around Kaua‘i. At last report, a total of about 74 beetles have been found in traps on the island. Multi-agency eradication efforts continue on the island.

Suspected CRB on Maui, Hawai‘i Island and Kaua‘i should be reported to the State’s Pest Hotline
808-643-PEST (7378). More information on CRB may be found at: https://www.crbhawaii.org/


CRB were first detected in Hawai‘i in December 2013 on O‘ahu, where they have gradually spread to areas around the island.

CRB are a serious pest of palm trees, primarily coconut palms, as the adult beetles bore into the crowns of the palms to feed on the tree’s sap. New unopened fronds are damaged in this way and when fully opened, may break and fall unexpectedly. If CRB kill or damage the growing point of the palm, the tree may die. Secondary fungal or bacterial pathogens may also attack the wounds caused by CRB, thereby killing the tree as well. Tree mortality after CRB attack has been reported to be anywhere from 10 percent to 50 percent. Dead trees then become a safety hazard as they may fall unexpectedly after the trunk rots, potentially resulting in bodily injury or property damage.

It is a major pest of palms in India, the Philippines, Palau, Fiji, Wallis, Nukunono, American and Western Samoa and Guam. It is still not known exactly how the beetles arrived in Hawai‘i.


Drone applying pesticide on palm tree on Maui


HDOA is committed to maintaining an environment free from discrimination, retaliation, or harassment on the basis of race, color, sex, national origin, age, or disability, or any other class as protected under federal or state law, with respect to any program or activity.

For more information, including language accessibility and filing a complaint, please contact HDOA Non-Discrimination Coordinator at 808-973-9591, or visit HDOA’s website at http://hdoa.hawaii.gov/.

To request translation, interpretation, modifications, accommodations, or other auxiliary aids or services for this document, contact the HDOA at 808-973-9591 or email [email protected].

Paʻa ka manaʻo o ka HDOA ma hope o ka pāpā loa ʻana i ka hoʻokae, ʻimi mākaia, a hoʻopilikia ʻana no kō ke kanaka lāhui, ʻili, keka, ʻāina, kūlana makahiki, kīnānā, a mea ʻokoʻa aʻe i kaʻa ma lalo o nā kānāwai pekelala a mokuʻāina, ma kona mau papahana a hanana.

No kekahi ʻike hou aku, e laʻa nā lawelawe unuhi ʻōlelo a me ka waiho ʻana i palapala hoʻopiʻi, e hoʻohui ʻoe me HDOA ma -808-973-9591, a i ʻole e kipa aku i kō ka HDOA kaha pūnaewele ma http://hdoa.hawaii.gov/.

No ke noi ʻana i kōkua māhele a unuhi ʻōlelo, a me nā lawelawe a kōkua keu o kēlā ʻano kēia ʻano e pili ana i kēia palapala, e kelepona aku i ke keʻena o ka Luna Hoʻokele o ka HDOA ma 808-973-9591 a i ʻole e leka uila aku iā [email protected].

Ti HDOA ket nakatutok iti panangtaginayon iti aglawlaw a nawaya manipud iti panangidumduma, panagibales, wenno panagabuso a maibasar iti puli, kolor, seks, nasion a nagtaudan, edad, wenno disabilidad, wenno aniaman a dadduma pay a klase kas maprotektaran iti masakupan ti linteg ti pederal wenno estado, mainaig iti aniaman a programa wenno aktibidad.

Para iti ad-adu pay nga impormasion, kairamanan ti aksesibilidad ti lengguahe ken panagidatag iti reklamo, maidawat a kontaken ti HDOA iti 808-973-9591, wenno bisitaen ti website ti HDOA iti http://hdoa.hawaii.gov/.

Tapno agkiddaw iti panagipatarus, interpretasion, modipikasion, akomodasion, wenno dadduma pay a pangtulong a tulong wenno serbisio para iti daytoy a dokumento, kontaken ti Opisina ti Mangidadaulo iti HDOA iti 808-973-9591 wenno ag-email iti [email protected].

HDOA ມີຄວາມມຸ້ງໝັ້ນທີ່ຈະຮັກສາສະພາບແວດລ້ອມທີ່ບໍ່ມີການຈຳແນກ, ການໂຕ້ຕອບ ຫຼື ການລ່ວງລະເມີດດ້ານເຊື້ອຊາດ, ສີຜິວ, ເພດ, ຊາດກຳເນີດ, ອາຍຸ ຫຼື ຄວາມພິການ ຫຼື ປະເພດອື່ນໆ ທີ່ໄດ້ຮັບການຄຸ້ມຄອງພາຍໃຕ້ກົດໝາຍຂອງລັດຖະບານ ຫຼື ລັດ, ໃນສ່ວນທີ່ກ່ຽວຂ້ອງກັບໂຄງການໃດໆ ຫຼື ກິດຈະກຳ.

ສຳລັບຂໍ້ມູນເພີ່ມເຕີມ, ລວມທັງການເຂົ້າເຖິງພາສາ ແລະ ການຮ້ອງທຸກ, ກະລຸນາຕິດຕໍ່ຫາ HDOA ທີ່ 808-973-9591 ຫຼື ເຂົ້າເບິ່ງເວັບໄຊທ໌ຂອງ HDOA ທີ່ http://hdoa.hawaii.gov/.

ເພື່ອຂໍການແປ, ການຕີຄວາມ, ການດັດແປງ, ການ ອຳ ນວຍຄວາມສະດວກ ຫຼື ເຄື່ອງຊ່ວຍ ຫຼື ການຊ່ວຍເຫຼືອບໍລິການເສີມອື່ນໆ ສຳລັບເອກະສານນີ້, ຕິດຕໍ່ຫ້ອງການ HDOA ຂອງປະທານ ທີ່

808-973-9591 ຫຼື ສົ່ງອີເມວຫາ [email protected].

夏威夷州農業部門在舉辦任何計劃或活動致力於維護一個不受種族、膚色、性別、國籍、年齡, 殘障或受聯邦及州法律保護的任何其他類別而受到歧視、報復或騷擾的環境。

如需更多資訊,包括語言無障礙和提交投訴,請致電 808-973-9591 聯絡夏威夷州農業部門,或瀏覽網站 http://hdoa.hawaii.gov/ 。

如對本文有以下相關需要 (翻譯、解讀、修改、調整或其他輔充的服務) 請致電

808-973-9591 或發送電子郵件至  [email protected].

Nakatuon ang HDOA sa pagpapanatili ng kapaligiran na malaya sa diskriminasyon, paghihiganti, o panliligalig batay sa lahi, kulay, kasarian, bansang pinagmulan, edad, o kapansanan, o anumang iba pang klase na protektado sa ilalim ng batas ng pederal o estado, na patungkol sa anumang programa o aktibidad.

Para sa karagdagang impormasyon, kasama na ang kahandaang mai-access ng wika at pagsasampa ng reklamo, mangyaring makipag-ugnayan sa HDOA sa 808-973-9591, o bisitahin ang website ng HDOA sa http://hdoa.hawaii.gov/ .

Upang humiling ng pagsasalin, interpretasyon, pagbabago, akomodasyon, o iba pang mga pantulong na tulong o serbisyo para sa dokumentong ito, makipag-ugnayan sa Opisina ng Tagapangulo ng HDOA sa 808-973-9591 o mag-email sa [email protected].

HDOA มุ่งมั่นที่จะรักษาสภาพแวดล้อมให้ปราศจากการเลือกปฏิบัติ การตอบโต้ หรือการล่วงละเมิดทาง เชื้อชาติ สีผิว เพศ ชาติกำเนิด อายุ หรือความทุพพลภาพ หรือประเภทอื่นใดที่ได้รับการคุ้มครองภายใต้กฎหมายของรัฐบาลกลางหรือของรัฐ ในส่วนที่เกี่ยวกับโครงการใดๆ หรือกิจกรรม

สำหรับข้อมูลเพิ่มเติม รวมถึงการเข้าถึงภาษาและการยื่นเรื่องร้องเรียน โปรดติดต่อ HDOA ที่ 808-973-9591 หรือเยี่ยมชมเว็บไซต์ของ HDOA ที่ http://hdoa.hawaii.gov/

หากต้องการขอการแปล ล่ามภาษา การปรับเปลี่ยน ที่พัก หรือความช่วยเหลือหรือบริการสำหรับเอกสารนี้ โปรดติดต่อสำนักงาน HDOA ของประธานที่ 808-973-9591 หรืออีเมล [email protected].