Rhodedendrons, Oaks and ramorum

[Log-ologist]

Who read the article on SOD in last Saturdays Telegraph?

 

( I thought bigA was a daily sport man, shows what I know)

[Andy Collins]

Who read the article on SOD in last Saturdays Telegraph?

 

( I thought bigA was a daily sport man, shows what I know)

Haha, rumbled!! Seriously, the client had read the Telegraph article, and queried it with me yesterday, as I hadnt looked into this before, said I'd do some research!

[Lee Winger]

How so?

 

Self seed everywhere, I saw an article in an Aussie tree mag a few years back..

[TheTreeWiseMen]

Google 'phytothora ramorum'.

[Andy Collins]

Cheers Rob, did some searching around, as I was posting the thread, but its also good to see what others have found "in the field", and it may have been a question someone else might have been looking for answers to.

[Bundle 2]

Phytophthora ramorum./.kernoviae RFS quaterly journal vol 101 no 3 july2007 pg 187

yes it can lead to infection of broadleaves from rhodedendron

[Peter]

Have they actually found SOD on an oak in this country?

 

My brother is head gardener at a rhodo mad estate in the lakes, and they have had SOD on rhodys, and had them all ripped out and the area sterilised to try and prevent spread.

[Log-ologist]

There have been suspected cases notably one in Cornwall on a Holm Oak situated in the Lost gardens of Helligan. They apparently refused to fell it because of the impact on the reputation of the gardens.

 

It seems that many of the cases in the UK have been through contamination from imported nursery stock. Notably Rhododendron , Azalea and Viburnum. The possibility of the compost being the host was investigated as the disease transmits itself through water/moisture. Plants in pots standing in contaminated water could be spreading the disease. Though the incidence of mature trees exposed to imported pot grown nursery stock is probably low.

 

hot from google. download and save as a pdf then open.

 

 

http://www.defra.gov.uk/planth/pestnote/newram.pdf

 

 

(read the last line at the bottom of page six, that made me laugh.)

[Andy Collins]

It seems that many of the cases in the UK have been through contamination from imported nursery stock. Notably Rhododendron , Azalea and Viburnum. The possibility of the compost being the host was investigated as the disease transmits itself through water/moisture. Plants in pots standing in contaminated water could be spreading the disease.

QUOTE]

 

Water/moisture eh? so would you think it possible for it to be spread thru decompaction treatments? Ie disturbing the disease in the soil, bound to be a certain amount of "blowback", then moving from tree to tree?

[Will]

We've got a couple of big pines to work on in a church yard which also has infected Phytophthora ramorum Rhododendrons growing in it.

We are getting a brief from DEFRA on how all our equipment / vehicles / chippers, needs to be disinfected. DEFRA have said that to do the work without carring out all their precautions will lead to very large fines as South Cornwall is now a controled Phytophthora ramorum area.

I'll let you know more when I've been briefed.

May be worth checking with DEFRA if you are in a controlled area?