Your maple looks fine until one morning it looks like confetti and the crown is gone. Pest drama often starts small but ends costly. The good news: every major tree pest we deal with in north-central Idaho leaves a few telltale signs months before the damage gets serious.

The three you should know

Bark beetles (esp. mountain pine, fir engraver)

Pitch tubes — small popcorn-like beads of sap on the trunk.
Reddish dust at the base of the tree.
Fading needles turning yellow then red, top down.
Treatment window is narrow. Once the crown reds out, the tree is gone.

Wood borers (bronze birch, emerald ash, etc.)

D-shaped exit holes in the bark.
S-shaped or zigzag tunnels under loose bark.
Dieback in the upper canopy spreading downward.
Birch and ash are especially vulnerable in our area.

Aphids, scale, and mites (the leaf gang)

Sticky leaves or honeydew on leaves and below the tree.
Sooty mold (black film) growing on the honeydew.
Curled, distorted, or speckled foliage.
Usually cosmetic on healthy trees, serious on stressed ones.

What to do when you spot something

Take photos — close-up of the symptom, mid-shot of the affected branch, full tree shot for context.
Send them to us before treating. Wrong treatment can stress the tree more than the pest.
Don’t move firewood between properties — it’s how most of these pests spread.

Most of what we get called for is stress, not pests. But when it is pests, catching them in the first month makes the difference between treatment and removal.