Eastern Hemlocks: Two Pests are Better than One
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- Опубликовано: 24 июл 2024
- Join Tufts professor Colin Orians as he talks about how the Eastern Hemlock manages to survive despite attacks by the hemlock woolly adelgid and other insects. Check out Colin's web page at: ase.tufts.edu/biology/faculty...
Photo credit
Spruce spider mite webbing
hortnews.extension.iastate.ed...
Laura Jesse, Horticulture and Home Pest News, Iowa State University 
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I found a patch of these trees back in the woods beyond a peaceful cemetery next to an old fallen-down house. It was euphoric there. I felt like I was in a magical world at another time. I took a branch. I did not know what they were or that they are endangered (I know spruce are having a rough time). I did know I don’t see them every day. I am going to TRY to propagate them. They are so beautiful. I would love to have a patch of these enchanting trees in my yard. I must find out how to grow them and keep them protected.
Thank you for this explanation of the pests, their behaviours and countermeasures. It will help me understand what I am seeing while photographing for my old-growth forest project this year.
Where I hunt in pa state game lands used to have a large hemlock grove along the northern ridge of the mountain. It was a beautiful location and very popular with the deer. Unfortunately they were attacked and virtually wiped out probably 20 years ago. Walking through there now you would have no idea, none of the old growth is even standing anymore. There are a few small trees under 6ft still standing. They look pretty rough, but makes me happy to see they are still fighting when I walk by each year.
Excellent video! This will help me as I walk the woods here in Haverhill.
being a new house owner, the side of my driveway has these trees, maybe 20 ft high up. The son of the previous own explained to me having them sprayed for the adelgid, i was like what? Anyhow, such a shame that so many have been lost.
Thank you for this excellent and informative video. Like you, I am surprised that there are still some hemlocks around that are not being treated with chemicals in order to survive. Thank you for explaining some of the mechanisms that are responsible for that. It would be wonderful if naturally genetically resistant trees would propagate.
Anything in Rosellinia Needle Blight? From my online research, it appears RNB is what’s turning the needles from green to yellow and dark brown. Help… please!
excellent -- relevant information clearly presented -- thanks -- but in truth, I don't know whether to spray my hemlocks or not
does wooly adelgid survive through colder winter climates? I've been looking and can't find an answer. A property owner thinks it's spread to northern locations is due to warmer winter temperatures, but I don't know.
So in your research, have you seen trees survive, although depleted, that have scale-only infestations?
Great video. Do the adelgids attack eastern white pines too? I think I saw some the other day on some juvenile plants.
That would be a different species as they are specific to hemlock here in the eastern US. In their native range, the reproductive stage can be found on Spruce
Possibly Pine bark aphid.
There not all gone. We still have tons in NE PA
True we do but it won't be long before the forestry service or the fish and wildlife game commission brings these bugs into our area or some other government agency decides it's a good idea to import something stupid in our area and brings these bugs along with that.
so if we only find adelgid on trees and not native mites is it safe to use imidacloprid?
If at all possible I would encourage you to avoid imidacloprid. As a neonicotinoid it has the potential to affect non-target insects that you don't intend.
@@corians1 I understand, but would only applying it to two trees have a large negative impact? Ibelieve the adelgid will kill the trees otherwise. Do you have an alternative suggestion to save the trees? Thanks
@@MrYorugua12345 good question. I'd think best to try treatment, but he does make some good points. lots of scientific studies do show benefits of imidacloprid in places in PA like Cook Forrest, Flight 93 memorial, etc.