Oak borer active in last two weeks

[Khriss]

Noticed this from last month's tree inspections, pollarded and felled several English Oak North London , in this section. Fine bore holes @1mm dia. Very active and fine dry sawdust.

 

 

 

[Khriss]

[Khriss]

Bore holes @1mm dia. 20mm to 30m depth. K

[AJStrees]

Were these already dead oaks? Interesting if not as the pinhole borer normally goes for dead wood I believe. Or else severely stressed or dying trees.

[openspaceman]

20 hours ago, Khriss said:

Bore holes @1mm dia. 20mm to 30m depth. K

pinhole oak borer Platypus cylindrus I expect. They do get into the heartwood if the wood stays moist, in the second season. It was almost unheard of pre 1987 but has remained widespread since.

[Khriss]

13 hours ago, AJStrees said:

Were these already dead oaks? Interesting if not as the pinhole borer normally goes for dead wood I believe. Or else severely stressed or dying trees.

Summer felled / pollarded 500mm+ dbh two yrs ago.. So not holding out much hope. Will turn into bat / raptor habitat poles with a forstner bit n cordless drill when I get round again. K