I am wondering where to find information on an insect which seem to enter the base of apple trees, chewing it's way in through a pin hole from which falls reddish brown wood dust.<<<<
I'm interested about it's life cycle (it appears to spend time in the trunk of the tree and come out somewhere else leaving a much bigger hole around which there is a large part of the bark down to the wood which is destroyed).
It also appears to be an annual cycle.
Up to now, I though it was a disease??!!!??
Hélène, zone 3
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