Emerald ash borer is an exotic beetle that was discovered in southeastern Michigan in the summer of 2002. The beetles nibble on ash foliage b
ut cause little damage. The larvae feed on the inner bark of ash trees, disabling the trees from transporting water and 
nutrients. Emerald ash borer could have arrived in the United States on solid wood packing material carried in cargo ships or airplanes originating in its native Asia.
ut cause little damage. The larvae feed on the inner bark of ash trees, disabling the trees from transporting water and 
nutrients. Emerald ash borer could have arrived in the United States on solid wood packing material carried in cargo ships or airplanes originating in its native Asia.
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