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Drones, Volume 6, Issue 10
October 2022 - 48 articles
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Cover Story: We developed a new aerial tree branch sampler to examine the feasibility of detecting forest pathogens collected from upper canopy branches. The pathogen of interest in this study is Ceratocystis lukuohia, which has caused widespread mortality in native ‘ōhi‘a forests across Hawai‘i. We aerially sampled branches from ten symptomatic trees, producing 29 branch samples with a maximum diameter of 4.2 cm and length of >2 m. We successfully detected the target fungal pathogen from the collected branches and found that branch diameter, leaf presence and condition, and wood moisture content are important factors in pathogen detection in sampled branches. The Kūkūau branch sampler can retrieve branches 7 cm in diameter, furthering pathogenic research requiring larger samples for successful diagnostic testing. View this paper
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