What are these cottony looking white things on my Hemlock?
Most likely they are adelgids. Adelgids are similar to aphids and can be very devastating in large numbers. They prefer Hemlock trees but are also found on other conifers like Douglas fir, larch, pine and spruce. They can produce white, cottony tufts on bark, branches, twigs, or needles.
Will they harm my trees?
When present in large numbers, adelgids may cause yellowing and
early dropping of needles and dieback of terminals. They can retard or kill
trees, although healthy plants can usually tolerate small adelgid populations.
Can I get rid of them?
When the population builds high enough, there are ways to treat
your conifers to reduce the populations. Treatment now is important if the
populations are causing problems. Otherwise preventative treatments in the fall
or early spring will help.
What can I do to help my tree look better?
Proper nutritional feeding and avoiding tree stresses – like lack of water or even salt build-up, will help. On conifers it is important not to over feed them and produce excess growth. At Arborwell, we use a very specific program that has the proper balance of nutrients for each type of tree. If you suspect salt may be a problem, we can identify how bad the problem is and provide cost effective solutions for that.
Fill out the form below to contact your Arborwell Arborist today and we will be happy to check out your hemlock – and all your conifers – to keep them healthy, now and for the future.
adelgids, arborist, conifers, hemlock, insects, plant health, plant health care