RNGR.net is sponsored by the USDA Forest Service and Southern Regional Extension Forestry and is a colloborative effort between these two agencies.

U.S. Department of Agriculture USDA Forest Service Southern Regional Extension Forestry Southern Regional Extension Forestry

Skip to content. | Skip to navigation

Home → Publications → Tree Improvement and Genetics → Northeastern Forest Tree Improvement Conference → 26th Northeastern Forest Tree Improvement Conference (1978) → Characteristics of Eastern Spruce Gall Aphid Attack Among 24 White Spruce Seed Sources in Central Maine

Characteristics of Eastern Spruce Gall Aphid Attack Among 24 White Spruce Seed Sources in Central Maine

Eastern spruce gall aphid attack on 24 range-wide white spruce seed sources growing in central Maine was investigated at the beginning of their sixteenth growing season in the field. Significant differences were found between seed sources in both number of gall aphids present and percent of trees attacked. The sources most heavily attacked were from eastern United States and southeastern Canada and those most resistant were from the Lake States and western Canada.


Download this file:

PDF document Download this file — PDF document, 410Kb

Details

Author(s): David S. Canavera, James Digennaro

Publication: Tree Improvement and Genetics - Northeastern Forest Tree Improvement Conference - 1978