Insect damage, cone dimensions, and seed production in crown levels of ponderosa pine

Authors

J. M. Schmid, USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, Fort Collins, Colorado
J. C. Mitchell, USDA Forest Service, Rocky Mountain Forest and Range Experiment Station, Fort Collins, Colorado
K. D. Carlin, Flagstaff, Arizona
M. R. Wagner, Northern Arizona University, Flagstaff

Abstract

Insect damage to second-year cones was generally not significantly different between crown levels, but was significantly different among areas and among trees within areas for Conophthorus, Megastigmus, and Cydia. Both cone length and width were not significantly different between lower and middle crown, but cone length was significantly greater in the upper crown. Seeds per cone ranged from 34 to 66, but the percent of sound seed per cone varied significantly according to the amount of insect damage.

Recommended Citation

Schmid, J. M.; Mitchell, J. C.; Carlin, K. D.; and Wagner, M. R. (1984) "Insect damage, cone dimensions, and seed production in crown levels of ponderosa pine," Great Basin Naturalist: Vol. 44: No. 4, Article 5.
Available at: https://scholarsarchive.byu.edu/gbn/vol44/iss4/5