Author:
Bergdahl D. R.,French D. W.
Abstract
Five species of pines (Pinuscontorta Dougl. var. latifolia Engelm., P. divaricata (Ait.) Dumont = P. banksiana Lamb., P. nigra Arn., P. ponderosa Laws., and P. sylvestris L.) from 2 to 36 months of age were inoculated with basidiospores of Cronartiumcomandrae Pk. in the greenhouse and field. For the youngest age class (2 months), combined results from greenhouse and field inoculations indicate that P. sylvestris (18.8% infected) was the least susceptible. The combined infection averages for P. divaricata, P. nigra, P. contorta var. latifolia, and P. ponderosa were 52.4, 58.7, 63.8, and 68.2% infection, respectively. One-year-old P. ponderosa seedlings had the highest percentage infection (27.5%). Except for one 3-year-old P. ponderosa seedling, the seedlings older than 1 year were not infected. Pycniospores occurred within 80 days on some of the seedlings of all pine species except P. nigra (86 days).
Publisher
Canadian Science Publishing
Subject
Ecology,Forestry,Global and Planetary Change
Cited by
3 articles.
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