Abstract

An infestation of the pandora moth, Coloradia pandora Blake, in pure stands of lodgepole pine, Pinus contorta latifolia Engelm., was discovered during August 1937 in the Arapaho National Forest in north-central Colorado. During 1938 and 1939 limited studies were made in that area on the life history and habits of the moth, as this was the first record of it reaching epidemic proportions in lodgepole pine and nothing was known about its biology in the Rocky Mountain Region.

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