Hemlock Woolly Adelgid

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Other trees are bothered by adelgids but they all seem to have their own special versions. I have not seen where the hemlock adelgid is a danger to anything else. But I also have not seen where Malathion will work on them, either. These are much harder to get rid of than your run of the mill aphid. Many of the chemicals that are used successfully on adelgids are only used by licensed arborists.The two insecticides I have listed are endosulfan (Thiodan) and Merit. I do not know if those are available to the homeowner where you live. Timing of spraying is also important for hemlocks. Usually when new tip growth is expanding. That is when the eggs have hatched and the crawlers are on the move and vulnerable to sprays.If those were my trees, I would call an arborist (get references).
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