Should I remove or save my scotch pine?
Scotch Pine is on the hazard list here, which shifts the odds toward removal. Pine wilt has effectively ended this species in the Midwest — the pinewood nematode, carried tree to tree by pine sawyer beetles, kills a mature Scotch pine within weeks to a few months and there is no cure once it is inside. Extension services across the region no longer recommend planting it anywhere in the Midwest, so in practice nearly every Scotch pine call is a removal call.
How to tell which one you've got
Pine wilt is fast and unmistakable: needles go grey-green, then tan, then brown, and the giveaway is that the dead brown needles stay attached rather than dropping, usually starting on one branch or one side and taking the whole tree the same season. A fresh cut into the trunk of an infected tree yields little or no resin, which is the field test; slow, even, bottom-up thinning is ordinary needle cast or site stress, but branch-by-branch browning in mid-to-late summer means dead, not stressed.
The structural question
Alive it is only moderate under ice — the crooked trunk and heavy divergent limbs leave an old open-grown tree off-balance, and the leaners tend to fail at the root plate rather than snapping mid-trunk. Dead is a different tree entirely: pine-wilt kills dry out fast, and standing dead Scotch pines shed large limbs and go over in ordinary wind, which is the real argument against letting one stand through a season.
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