There is people already doing it, but it's impossible for any individual to have clones of all remaining resistant trees in europe. I do think it would be a good idea though to grow many different resistant native clones (without asian ancestry or modern crosses) together, let them cross and grow out the seeds. But since there is so few disease resistant native trees, whatever genes give them their resistance (if that's what it is) must be a rare combination of recessive genes. If only disease resistant different clones were grown together shouldn't there be a higher percentage of resistant offspring? and Can recessive genetic traits somehow "switch" and become dominant? i don't know.... Here a website with much more info done by someoene far more knowledgeable for those who are interested: www.resistantelms.co.uk
So i finally met the guy again who told me about companion planting elm trees with lilac. I asked him where he had heard this.
He told me he heard it on a radio programme with Jean-Marie Pelt, a well-known french biologist.
As the story goes they were doing test plantations of elm trees to evaluate resistance in the elsass/lorraine region of France.
They then noticed that some elm trees were not struck by the disease and that all of those were growing in close proximity to lilac.
They replanted elm trees with lilac to try it out and none of them got sick.
It sounds great and while this will not reintroduce the real elms to our countryside on a wide scale it could offer a solution for landowners to have a beautiful disease-free native elm in their gardens.
I am just asking myself if this were true why hasn't this received much more widespread attention?
Ok for large scale forestry this is useless but all those private gardens that could have elms again!
I am going to try it out. Lilac grows 20 - 23 feet tall and is beautiful. It could grow on the South facing side of a large healthy native elm!
Let's hope this works and good luck to all who will try! We will know in about 15 years
If you couple it with a native strain of elm that already shows higher resistance your chances are increased again!
Post by prairiegarden on Aug 8, 2016 14:52:59 GMT -5
Sounds worth a try. Going to try to do some cuttings of sour cherry seedlings and see if I can get them to root, I've got both those and Nanking cherry and a few other things (Raspberry!!) fighting for space. Could be quite an assortment of odds and ends if everything grew. Thanks everyone for comments!
Interesting thread. Elms transplant well, I have popped up lots of them to plant in our woods. Federal Forestry (Canada) has been taking slips off old elms and grafting lots of copies so they can innoculate some copies to see if any live. The ones that do have been planted in large groves to make seed. Rarely, seed is available from the seedbank. Not all seedlings have good resistance, and some are pretty straggly, not horticultural beauties. The federal breeder says there are 2 or 3 major genes and some minor ones, that if you get lucky and stack them all in one seedling, make a very tolerant tree. I don't think they are giving out slips yet, but they may occasionally have seed. On line chit chat suggests a shape pocket knife and grafting any old trees you can find into whatever elm you have at home may provide some tolerant seedlings. I've got a few that way myself, on totally succeptable roots, so am hoping for seed sooner, rather than later. PEI, where I am from, is considered 'generally infested' with the DED, so I'm not sure I can mail anything except seed away. It will be a while till I have seed. Two promicing seedlings are 5 growing seasons old, and the bark is starting to furrow, so I'll know soon enough if they have any tolerance. The seedparent survived innoculation. If there is any interest, I can keep seedlots seperate when my grafts flower, and we can all trade seeds.