Cone Stimulation of Abies procera —Evaluating Variable Rates of GA 4/7, Timing, and Girdling


This study investigated cone stimulation options having operational relevance to seed orchard managers. Replicated trials with five treatments were established at three orchard sites. Treatments included three variable rates of gibberellic acid GA4/7 with girdling, one rate without girdling, and one treatment with girdling and GA 4/7 at a later treatment date. Cone and pollen production were inventoried. Results varied by orchard site. One orchard showed no relationship to treatment for either cone or pollen production. Another orchard showed treatment effect for cones but not pollen. At the third site, treatment influenced both pollen and cone production.
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Publication Tree Planters' Notes
Event 2008
Section 3
Author Chal G. Landgren, Sara R. Lipow, James Reno, and Robert Ohrn
Volume 52
Number 2
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