Researchers have developed a new, more efficient tool for detecting the pathogens believed to be the cause of Rapid `Ōhi`a Death (ROD), according to a recently published study by the Hawai`i Cooperative Studies Unit at the University of Hawai`i at Hilo, the USGS Pacific Islands Ecosystem Research Center (PIERC), and USDA Agriculture Research Service (ARS).
The authors of the report have developed a portable lab for diagnostic field testing for the two species of fungal pathogens that infect `ōhi`a (Metrosideros polymorpha). The portable lab, which provides quick results and reduces instrumentation costs, is currently being used by the Big Island Invasive Species Committee (BIISC) to detect infected trees and identify the distribution of the pathogens.
“Having this portable lab gives us the capability to do our own diagnostics and get a quicker answer about whether or not a tree is positive for ROD. The result then allows us to take management actions right away or do more targeted testing,” said Bill Buckley, Forest Response coordinator for BIISC and leader of their ROD Early Detection and Rapid Response Team.
The Hawai`i Department of Agriculture is also planning to use the portable lab to help screen shipments of `ōhi`a logs for the pathogens.
ROD was first identified in the lower Puna District in 2014, and now infects more than 50,000 acres of private and state forest lands on Hawai`i Island. ROD is a serious threat and imperils long-term sustainability of watersheds managed by Department of Interior agencies, the State of Hawai`i, and State Watershed Partnerships.
For more information on the study and its findings, visit dspace.lib.hawaii.edu/handle/1….