This is so sad. Many, many of my Pennsylvania Hemlocks have the Hemlock Woolly Adelgid pest, which will kill them. I have resorted to years of chemical sprays by professionals, but they are still succumbing. I know of nothing else to do, but with our persistent droughts compromising their strength to fight off pests, I will probably lose them all to this devastating pest. I have discontinued the spray, but have researched another possibility. If I can get someone to apply it, I will try one more option called Imidacloprid Therapy. It is a way to treat them systemically and would last 3-5 years. It pays to do research on the internet.
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