From Science: Researchers all over the world are trying a new approach to prevent costly damage to forests from invasive pests: planting “sentinel trees” from their own regions in distant nations and then observing which insects attack. Results should help managers recognize and snuff out threatening introduced insects if they arrive in the trees’ native countries. The Forest Service is funding several projects involving sentinel trees.
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Gabriel Popkin. Scientists plant ‘sentinel trees’ to warn of devastating pests. 2020. Environment doi: 10.1126/science.abb8971