| Below: Tussock
Moth Cocoon |
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Damage:
The Douglas-fir tussock moth has the potential to cause significant
mortality due to defoliation. In addition, top-kill, growth
reduction, and secondary attacks by insects and fungi may follow
severe defoliation.
Similar Damage:
Early damage and webbing in trees may be similar to that caused
by the western spruce budworm. The larvae are very different,
however, and the tussock moth voraciously consumes both new
and old foliage as opposed to the primarily new foliage consumption
by the budworm. Tussock moth infestations tend to be relatively
small and localized near the edge of open range, whereas western
spruce budworm infestations are more widespread. |
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