Removals, Diseases and Pests

Removals, Diseases and Pests

3-10-2015 – We removed two dead douglasfir Tuesday from a lakeside property south of Yellow Bay. After they came down we inspected the bark and found a flat-headed woodborer larva. These pests burrow under the bark and destroy wood, further weakening trees.

woodborer larva
Flat-headed woodborer larva.

More interestingly, we discovered Armillaria root rot in both trees. This decay is characterized by fruiting bodies (fungus) near the base and a thin, peeling layer just inside the bark (see images). This fungus absorbs water before it can get up the tree. It was likely the primary stressor and the woodborer a secondary pest.


If you see fungus sprouting on your trees, it is likely that decay is imminent. The sooner you seek an assessment for fungicidal treatment, the more likely your tree will survive.


Across the way we spotted a serious dwarf mistletoe infestation. Can you identify a dwarf mistletoe plant in your trees? These aren’t the kind of mistletoe you kiss under at Christmas. These green, bushy parasites are unhealthy and unsightly. The cure is removal, and the sooner the better.


Later we removed this 90-foot douglasfir that died from a dwarf mistletoe infestation. As you can see, even the most established trees can succumb to this highly contagious plant pest.