Forest Health Survey – 2022

This dataset shows where tree damage was delineated in aerial surveys in 2022. It was developed by the Minnesota Department of Natural Resources. Flights occurred from early June to mid September. The most common disturbers include spruce budworm, eastern larch beetle, aspen decline, unknown cause of defoliation on hardwoods and aspen, wind, forest tent caterpillar, oak wilt, flooding, unknown causes of mortality, large aspen tortrix, bark beetles on pine, larch casebearer, and twolined chestnut borer. This survey indicates where significant tree defoliation and mortality occurred and aids in monitoring trends in forest health conditions.