New York Times: In this corner of America known for its vast landscapes, rugged mountains and deep river canyons, signs of the havoc created by the minuscule tamarisk beetle are everywhere.
For miles along the banks of the Colorado River, hundreds of once hardy tamarisk trees — also known as salt cedars — are gray and withered. Their parched branches look like victims of fire or drought.
But this is not the story of beloved trees being ravaged by an invasive pest — quite the opposite. Farmers, ranchers and…

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