Larger 8 toothed Spruce bark beetle .

[openspaceman]

1 hour ago, devon TWiG said:

It appears that  to leave deadwood , or create standing deadwood is particularly trendy at the moment ...for wildlife reasons ...

I don't expect it is deadwood that's a problem but that recently felled logs big enough to provide fresh breeding galleries that remain moist enough to support the grubs. If they are small they will dry quickly and the grubs cannot live on dry wood.

 

Similarly a healthy spruce will drown the bugs in resin but a sickly one will not. Insects seem to have a better ability to find a stressed tree to invade than us.

[spuddog0507]

17 hours ago, Stubby said:

Coppicing sweet chestnut here at the moment hundreds of posts stacked and pointed up . 

thats sweet chestnut, mostly spruce and a bit of dougles up here, 

[spuddog0507]

14 hours ago, openspaceman said:

How is that collected and chipped, it must be broke up and muddy?

usually done with a forwarder with a brash grab on it, one site a couple of year back they had a 20 tonne digger with a brash rake on it and only thig they left was the needles,, 

[Stere]

Quote

I don't expect it is deadwood that's a problem but that recently felled logs big enough to provide fresh breeding galleries that remain moist enough to support the grubs. If they are small they will dry quickly and the grubs cannot live on dry wood.

 

Similarly a healthy spruce will drown the bugs in resin but a sickly one will not. Insects seem to have a better ability to find a stressed tree to invade than us.

 

The gov info  mentions stacked wood piles

 

Eight-toothed spruce bark beetle (Ips typographus) - GOV.UK

WWW.GOV.UK

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Information about the eight-toothed spruce bark beetle, including how to report sightings.

 

and that wood under 8cm diameter isnt a problem is mentioned here:

 

https://assets.publishing.service.gov.uk/media/63e3b965d3bf7f17300052c0/Ips_typographus_infographic_FINAL.pdf