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RAPID ʻŌHIʻA DEATH

A Newly identified disease

A newly identified disease has killed hundreds of thousands of mature ʻōhiʻa trees (Metrosideros polymorpha) in the South Hilo, Puna, Kaʻū, and Kona districts of Hawaiʻi Island. (Photo by JB Friday)

NEW IDENTIFIED DISEASE
Crowns of affected trees

Crowns of affected trees turn yellowish (chlorotic) and then brown within days to weeks. (Photo by JB Friday)

CROWN SYMPTOMS
Ceratocystis fungus

Ceratocystis fungus appears as dark, radial staining in the sapwood, sometimes accompanied by reddish reaction wood in the heartwood of the tree. (Photo by JB Friday)

Don't spread ROD: Don't moveʻōhiʻa

Don't spread ROD: Don't move ʻōhiʻa, clean your tools, your gear, your vehicle. (Photo by JB Friday)

Fine boring dust

Fine boring dust produced by ambrosia beetles contains large numbers of fungal spores. Windblown boring dust could spread the disease long distances. (Photo by JB Friday)

ʻŌHIʻA ARE HAWAIʻI'S FOUNDATION 

ʻŌhiʻa (Metrosideros polymorpha), the most abundant native tree in the state of Hawaiʻi, are dying from a new fungal disease. On Hawaiʻi Island, hundreds of thousands of ʻōhiʻa have already died from this fungus, called Ceratocystis. Healthy trees appear to die within a few days to a few weeks, which is how the disease came to be called “Rapid ʻŌhiʻa Death.” This disease has killed trees in all districts of Hawaiʻi Island and has the potential to kill ʻōhiʻa trees statewide.

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WHERE IS ROD? 

  

 

Hawai'i Island Distribution Map showing sites where Ceratocystis wilt confirmed.

 

Kauai detection

Updated May 2018


Currently, the disease is found on the Islands of Hawaiʻi and Kauaʻi. Ceratocystis huliohia, the less virulent of the two fungal pathogens causing Rapid ʻŌhiʻa Death, was detected on Kauaʻi in May 2018.

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WHAT CAN WE DO?

Help prevent spreading Rapid ʻŌhiʻa Death by practicing these five things:

1. Avoid injuring ʻōhiʻa.  

2. Don’t move ʻōhiʻa wood or ʻōhiʻa parts.

3. Don’t transport ʻōhiʻa inter-island.

4. Clean gear and tools, including shoes and clothes, before and after entering forests.

5. Wash the tires and undercarriage of your vehicle to remove all soil or mud.

ANNOUNCEMENTS

ʻŌhiʻa Love Fest NEW DATE:

Sunday, October 21, 2018, Hilo, HI

ʻImiloa Astronomy Center, 9AM-4PM

 

getmedia.ashx

 

 

ROD Quarterly Newsletter May 2018 (Vol.2, No.2)

 



 



This website and the Rapid ʻŌhiʻa Death extension program partially funded by the
USDA National Institute of Food and Agriculture (NIFA) through the Renewable Resources Extension Act and the Smith-Lever Act