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Look around Southeast and you will see a lot of evergreen trees that aren't so green. Southeast Alaska's hemlock and spruce trees are fending off an assault by a number of pests and diseases, most notably a caterpillar that causes the conifers to turn reddish-brown. The main culprit is the western blackheaded budworm, a moth caterpillar that feeds on hemlock and spruce needles, according to U.S. Forest Service Alaska Region entomologist Elizabeth Graham in Juneau. Graham said Southeast trees...