Wooly adelgid treatments
I have two large hemlocks that are showing signs of egg sacks. I read that you can treat this at the trunk for large trees. Any suggestions on products and method?
The DCNR in my district is recommending Safari, a systemic pesticide that has to be applied by a licensed tree service. It will last a year or two. For a one time result, the service can spray sevin or horticultural oil.
There is a federally approved biological control in the form of a Japanese lady beetle S. tsugae that is being sold at tree-savers.com out of Scranton. You can check that out.
It's important to teat the tree before it gets too desiccated by HWA.