Pests causing more damage than expected to the Allegheny forest
PITTSBURGH (AP) — With insect pests are causing more damage than expected to valuable black cherry trees and other species in the Allegheny National Forest in Pennsylvania, more tree planting and other measures in several areas are being proposed. The cherry scallop shell moth, fall webworm and other pests are causing greater-than-expected tree defoliation, mortality and regeneration problems, The Pittsburgh Post-Gazette reported. The U.S. Forest Service is therefore proposing more aggressive timbering and tree planting in three existing project areas in the Marienville District of ...