Interior Alaskas hot and dry summer of 2013, coupled with an invasion of insect pests, has taken a steep toll on the regions birch trees, experts say.
There has been an outbreak in Fairbanks of the amber-marked birch leaf miner (Profenusa thomsoni), an insect that came to North America in the early 1900s and arrived in Fairbanks by about 2002.
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