Global Short Term Trend: Decline of 10-50%
Comments: Butternut is experiencing a rapid decline due to the spread of butternut canker. The disease has spread rapidly throughout the species' range, and the downward trend is likely to continue until disease resistant trees are identified, propagated, and successfully reintroduced.
Schlarbaum et al. (1997) reported that 77 percent of butternut trees in the southeastern United States died in a 30 year period. Forest Service survey data indicated overall declines of 23% in the number of butternut trees in 7 midwestern states over various time intervals ranging back to 1990 (USDA NRCS 2004).
Global Long Term Trend: Increase of 10-25% to decline of 30%