Alinicoll

I would consider Pseudoinonotus dryadeus.

I'd have a look a Rigidoporus. Try cutting a wedge if you can to look at the flesh and tube colours.

Regarding predation it is known that great tits eat the caterpillars. There are also at least two species of fly and probably a number of parasitoid wasps which parasitise the caterpillars.

These guys, Carcelia iliaca are a significant parasitoid specific to OPM

Interesting, be interesting to see what they do.

The large number of outliers from 2019 were eradicated by the Forestry Commission. Where outbreaks are found in the pest free zone, the Forestry Commission are very effective at dealing with them.

I think really what these outliers show is that even if a tree or trees are brought in with OPM on, it’s difficult for an isolated population to establish.

If you go into the layers tab on the map it shows the 2019 map of eradicated infestations following an exercise tracing all imported oaks. That shows how many eggs are still getting in on young trees.

This demonstrates how unusual it is for a population to establish from an import.

I think that'll be last years map. I don't think they live report.

Be interesting to know if it's an isolated case and wether it's just one nest or many.

Every year there are a number of isolated infestations that have come in on new planting, these ones normally get erradicated quite quickly.

On 06/12/2022 at 20:33, adw said:

Pictures of both serial no./ rating Plates please.

Sorry, not been on for a while.

Obviously one saw is too old for that issue, the other one doesn’t look like in the right range of serial numbers.

It's certainly abit disappointing not to be able to service the older saw.

One option I was cosidering is to replace the old control unit, throttle, switch etc for the newer generation stuff. The older motor runs in the new saw but it has an extra plug. Any opinions on the viabilty of doing that.

Or as Dan Maynard suggests, maybe look at having the wire fixed. So much trouble over such a tiny little wire 🤣

Thanks again for your responses

In case this is of help to anyone...

Interestingly, having pulled the two saws apart they are quite different inside, so that scuppered the part swapping plan!

Essentially the same but the wiring and plugs are different. The motor is a different size and has an extra plug on.

The older one of the two (1st generation?) seems to have a damaged wire between the control unit and the throttle, also a coroded pin on the same wire were it attaches to the on/off switch. If I wiggle the wire about the saw comes on an works fine, but I can't find anywhere that sells the parts. Only the newer (2nd generation?) saw.

The newer ones seem to be better designed for fixing as they are more modular and the wiring is tidier.

Anyway, I appreciate the help and information.

I seem to have solved the issue with the newer saw but time will tell.

So, a possible option if I suspect a particulat part is faulty would be to just swap parts about from different saw!

Which to be honestf is often how petrol saws get fixed 😂

Thanks for the replies, 

The one that is stopped completely has no lights come on and makes no sounds or movement. I'll check the connections again and see if that helps.

The one that runs intermitently switches on and the motor runs, but under load it looses power and then regains it intermitently.

I'll have another play with them when I get the opportunity.

Does anybody have any information, experience or places to refer to trouble shooting and repairing battery saws?

We have a couple of saws, one stopped working completely, the other runs intermitently.

Thanks

Yes, it is turkey tail and I'd say it's living on the wood below. It has a wide range but I don't think fibreglass is a known substrate!

Probably worth pulling the fruit bodies off and seeing what's underneath.

Is that not just the basal flare? I can't see any fungus. There doesn't seem to be any bleeding which they usually do quite spectacularly when stressed. Monkey puzzles don't like root stress, that can cause problems. A picture of context might help, shade can also cause lower branches to die.

What's the soil type? It looks like lime induced chlorosis.

Yep! That's OPM!

I would go for a fix bollard over a floating device any day. We have the tree runner, its pretty light and works great.

In the past I have used an RCW3001 which is bomb proof but heavy, not used the 2001.

They look like strip cankers. Whats the soil like? Drought stress can cause this.

It looks like Mycena galericulata.

It looks more like bacterial canker to me.

If you could persuade the owner to instal even a low fence around the rooting area that would probably help massively with the compaction. 2 - 3 ft post and rope fencing looks nice and whilst it doesn't stop people, most won't cross it, great for highlighting and protecting the tree. There is little point in decompacting if the compaction can re occur. What sort of site is it?

The non ce cougar is a good all-rounder.

It looks like expanding foam on a Lime tree to me, unless it's a very rough barked beech.

As far as the orange blob goes, maybe cut a wedge from it. That will help to find out what it is.