Distribution of Redwood Caused by the Balsam Woolly Aphid in Fraser Fir of North Carolina

Gene D. Amman

Distribution of Redwood Caused by the Balsam Woolly Aphid in Fraser Fir of North Carolina

Informally Refereed

Authors:

Gene D. Amman

Year:

1970

Type:

Research Note

Station:

Southern Research Station

Source:

Res. Note SE-135. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station. 4 p.

Download PDF (96 KB)

Abstract

Examination of 5-foot sections of felled Fraser fir, Abies fraseri (Pursh) Poir., trees infested or killed by the balsam woolly aphid, Adelges piceae (Ratzeburg), revealed that the height of the first annual ring of aphid-caused redwood increased as the height of the trees increased. The number of red rings varied from two in a tree 5 inches in d.b.h. to five or six in all trees 9 or more inches in d.b.h., indicating that larger trees can sustain aphid attacks for longer periods before death than can smaller trees.

Citation

Amman, Gene D. 1970. Distribution of Redwood Caused by the Balsam Woolly Aphid in Fraser Fir of North Carolina. Res. Note SE-135. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southeastern Forest Experiment Station. 4 p.