Ulmus New Horizons in GreenBlue arborsoil

[Roz]

Does anyone have any real time knowledge of this tree as a tree for urban situations? I have read various profiles about it which all indicate that it makes a good suitor BUT then read that it requires high maintenance due to co-dominant stems, heavy side branches, crown die back and susceptible to scorch in the summer. The proposed location is a riverside development within the square and along the river frontage but facing new buildings with glass frontages so thinking about heat reflection in the summer, high pedestrian traffic with high maintenance....... etc

 

They are to be planted in GreenBlue arborsoil - once again anyone with any experience of this product? I can read the blurred on their web site and look at the case studies but what about 3, 4, 7 years down the line?

 

Any thoughts/experience greatly received.

[agg221]

I would want to see the test data for DED.

 

New Horizon is an American hybrid and there are differences between the US and European strains of DED. This caused some quite high profile problems when Princeton was released as it proved to have inferior resistance in the UK.

 

If New Horizon has not had any European testing there is a risk that it is similarly vulnerable. I would then be more inclined to look at Columella, Clusius or Loebel, depending on your preferred habit.

 

Alec

[Roz]

Thanks Alec - this was my concern as you say Princeton wasn't the panacea it was made out to be, it also developed tight unions at 15-20 years of age and I understand from Barchams as soon as they knew this they stopped selling it.

[Gary Prentice]

I would want to see the test data for DED.

 

New Horizon is an American hybrid and there are differences between the US and European strains of DED. This caused some quite high profile problems when Princeton was released as it proved to have inferior resistance in the UK.

 

If New Horizon has not had any European testing there is a risk that it is similarly vulnerable. I would then be more inclined to look at Columella, Clusius or Loebel, depending on your preferred habit.

 

Alec

 

Alec, where do you get all this information from? You always appear to be the 'go to' guy for elm info so are you willing to share your sources:biggrin:

Gary

[agg221]

Alec, where do you get all this information from? You always appear to be the 'go to' guy for elm info so are you willing to share your sources:biggrin:

Gary

 

Hi Gary, happy to, but it's a bit of a meandering compilation

 

Firstly, I am lucky enough to live in an area with a uniquely diverse elm population. On my drive to work I see seven distinct populations which may be resistant and three more which have some field resistance. There are twenty or more within around a half hour drive (that I've found so far).

 

I have read a lot of literature - everything from early work like Melville and Richens to more recent publications by the Colemans in Edinburgh and the proceedings of various elm conferences.

 

I know the person who runs the resistantelms website (some of the photos I have posted on here may be familiar...) He is a lot more connected than me which is how I get a lot of the more anecdotal information.

 

Although the UK hasn't really had an elm programme, continental Europe has, with some good results. I haven't met them in person but have communicated with Alberto Santini who heads the Italian programme and is sort of the godfather of elm breeding, and Juan Martin who heads the Spanish programme which identified seven extremely resistant clones of U.minor.

 

And then I just keep my ears and eyes open and pick up stuff along the way.

 

Alec

[Gary Prentice]

Thanks Alec, that gives me several starting points for some further reading and research.

 

Gary

[agg221]

Thanks Alec, that gives me several starting points for some further reading and research.

 

Gary

 

You're welcome. If you don't already have them, 'Elm' by Richens and 'Essex Elm' by Hanson are probably the best starting points.

 

Alec

[Gary Prentice]

I'll have a look for them tonight. It's the beauty of this forum, the wide range of 'specialisms' that the membership have among them. I read the opening post this morning, accepted that I knew nothing of the variety and therefore couldn't offer anything constructive at all. But I knew a man who could:biggrin:

 

Thanks again

 

Gary

[Gary Prentice]

You're welcome. If you don't already have them, 'Elm' by Richens and 'Essex Elm' by Hanson are probably the best starting points.

 

Alec

 

Based on your recommendation, I've bought them both this evening. I told 'she who must be obeyed' that YOU said I needed them:biggrin:

[Gary Prentice]

You're welcome. If you don't already have them, 'Elm' by Richens and 'Essex Elm' by Hanson are probably the best starting points.

 

Alec

 

Both of these have now arrived and I've had a quick scan through. Good books.

 

My interest is piqued, so I've ordered [ame=http://www.amazon.com/Dutch-Elm-Disease-Research-Approaches/dp/1461568749/ref=sr_1_1?s=books&ie=UTF8&qid=1457858095&sr=1-1&keywords=Dutch+Elm+Disease+Research%3A+Cellular+and+Molecular+Approaches]Dutch Elm Disease Research: Cellular and Molecular Approaches: Mariam B. Sticklen, James L. Sherald: 9781461568742: Amazon.com: Books@@AMEPARAM@@http://ecx.images-amazon.com/images/I/51at3hxPigL.@@AMEPARAM@@51at3hxPigL[/ame]