Observatree Guidebooks

[Jon Heuch]

Download and Read Observatree – the official project website

 

In coming weeks Observatree will upload several different disease Guidebooks; each will be for a separate disease and at present there are only two - Dothistroma red band needle blight and Chestnut Oriental Gall wasp. These will be loaded with photographs for identification in the field and the Forestry Commission are mass producing them for their staff. They are intended for the Observatree volunteers and the 21 priority pests (some of which aren't here yet) they are monitoring, so there won't be comprehensive cover.

 

There is also a calendar:

 

http://www.observatree.org.uk/wp-content/uploads/2015/10/OTREE-Priority-PD-Overview-calendar-SF-final3.pdf

[David Humphries]

Thanks for the post John, very useful.

 

Though no Xylella fastidiosa on the Observatree Signs and Symptoms Calendar ?

 

 

.

[Jon Heuch]

Thanks for the post John, very useful.

 

Though no Xylella fastidiosa on the Observatree Signs and Symptoms Calendar ?.

 

 

If Xylella gets to Holland it will be the end of their industry; if it gets here we might as well give up!

 

It is an interesting point and I will pass it on!

 

Jon

[Jon Heuch]

Thanks for the post John, very useful.

 

Though no Xylella fastidiosa on the Observatree Signs and Symptoms Calendar ?.

 

and the answer, logical though it is, is quite frightening......

 

simply put, the combination of pest and host species is so multitudinous that if they were to include it they would be overwhelmed with numerous erroneous IDs and no capacity to check them all up. As the host list is so long they cannot produce a guide showing what it looks like for each host species......sounds like we will only know when we have it......

[David Humphries]

Oddly enough, I found something that has very similar X.f symptoms (outer leaf necrosis) on a grape vine just today.

 

Will be sending a sample to Alice Holt.

 

 

 

We'll be focusing on X.f as well during this summer's Ceratocystis platani surveys across the London Boroughs.

 

.

[Betula]

I'm also doing that and will probably be tricky trying to spot it through the anthracnose! (if it is there). I did hear a theory that X. fastidiosa is not well suited to the UK climate so may not be as effective, probably just a hopeful theory though!

 

I also found something similar in a nursery over the weekend, will go back to get a sample

[Kveldssanger]

I'm also doing that and will probably be tricky trying to spot it through the anthracnose! (if it is there). I did hear a theory that X. fastidiosa is not well suited to the UK climate so may not be as effective, probably just a hopeful theory though!

 

I also found something similar in a nursery over the weekend, will go back to get a sample

 

There are a large number of different genotypes that have different host ranges, and therefore I expect also tolerances. Climate can have a stifling effect, though with a vast inoculum base it only takes a few genotypes to set hold and breed for there to be an issue, is my understanding.

[Betula]

Multiplex is the one that is the big problem for us

[Thesnarlingbadger]

Useful to know. That calendar seems pretty handy too :-). Thanks