Abstract

Comandra blister rust, caused by the fungus Cronartium comandrae, reduced growth and survival of lodgepole pine trees (Pinus contorta subsp. latifolia) in the central Rocky Mountains. Stem analyses were used to determine annual increments of total cubic bolewood volume for 74 lodgepole pine trees 4-22 m tall, cankered by comandra blister rust. Mean annual increments after canker establishment were reduced 32% for trees with crown tops killed by comandra blister rust (spiked) and 9% for trees not yet girdled. Volume increments of spiked trees decreased each year after canker establishment until crown loss (top-kill) occurred; afterward, increments remained small and constant [...]

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