Be aware of your surrounds. The hemlock woolly adelgid is a skilled hitchhiker. Therefore avoid brushing up against infested branches and parking your car next to
hemlocks. Try and brush off any adelgids as soon as you come in
contact with them instead of giving them a lift.
Don't place birdfeeders next to your hemlocks. One way HWA is spread is by bird traffic.
Monitor your trees. There is no need to pre-treat trees chemically. It is better to wait until there are signs of infestation.
Also don't fertilize infested trees as you just provide additional
nutrients to the HWA.
Manually prune of adelgids if you see them on your trees.
Especially if you don't plan on treating them. Another option could
be removing the hemlock if you choose not to treat, which will
prevent generations of adelgids surviving on your tree and spreading
to others.
Don't transport infested saplings to be planted elsewhere.
If you have lots of hemlocks on your
property and can't treat them all you can thin out your hemlocks and
save the best ones.
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Environmental Leadership Center
Predator Beetle Lab
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