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Koa moth (Scotorythra paludicola) caterpillar abundance in response to koa moth outbreak, 2013-2014

Published by U.S. Geological Survey | Department of the Interior | Metadata Last Checked: January 27, 2026 | Last Modified: 2021-04-13T00:00:00Z
The koa moth (Scotorythra paludicola) has been reported to irrupt on occasion over the past 100 years, sometimes defoliating its host plant, koa (Acacia koa), during the event. This data release includes metadata and tabular data that document temporal abundance patterns and of the koa moth caterpillar (Scotorythra paludicola) during an outbreak of the koa moth that resulted in widespread defoliation of koa across much of Hakalau Forest National Wildlife Refuge during 2013-2014. The data set documents numbers of caterpillars collected from koa foliage during the outbreak. To track caterpillar abundance during this event, koa branch tips were clipped from trees and the number of caterpillars within the foliage counted, and the weight of foliage measured.

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