Forty-one holes were made in the ground around this 41" diameter hemlock tree. Each hole got 6 pumps of insecticide.The Maryland Department of Agriculture and DNR are using soil and tree insecticide injections for the hemlock forest at Swallow Falls State Park against the HWA, the hemlock woolly adelgid, a tiny insect native to Japan that was discovered in Virginia in 1951. The insect had caused a decline in the hemlock population along the eastern seaboard.
Baltimore Sun photo by Algerina Perna
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