Most of the pecan trees on Yon Family Farms have been standing for 40 years, some as many as 100. The combination of rain and wind from the hurricane, which caused devastation as it swept along the Georgia border and through the Upstate, washed out around three-quarters of the approximately 100-acre orchard. Toppled trees and debris also destroyed miles of fences on the family’s beef cattle farm, Lydia Yon said.