Winter Moth Defoliation Risk Map

Winter Moth Defoliation Risk Map

This map predicts risk for defoliation of hardwood trees by winter moth (Operophtera brumata). Estimates of risk are based on:

  • Locations with mapped defoliation in previous years
  • Pheromone traps set by the Maine Forest Service in December
  • Moth flight reports from our on-line survey in December and other customer calls
  • Moth samples submitted by the public
  • Weather related events that impact moth populations.

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More Winter Moth Resources