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Reduction in growth of pole-sized Ponderosa pine related to a Pandora moth outbreak in central Oregon

Creator:

Cochran, P. H.

Abstract:

A pandora moth (Coloradia pandora Blake) outbreak began in 1991 in a ponderosa pine (Pinus ponderosa Dougl. ex. Laws) spacing study area that also included scattered sugar pine (P. lambertiana Dougl). The relation of defoliation to five tree spacings (with and without understory vegetation) was examined, and stand growth reduction...

Resource Type:

Technical Report
The white-pine weevil

Creator:

Hopkins, A. D. (Andrew Delmar), 1857-1948 and United States. Bureau of Entomology

Abstract:

The Bureau of Entomology has been conducting systematic and economic investigations of the weevils infesting the bark of the trunk and terminal shoots of conifers in the United States, the results of which will be published in the regular technical and popular bulletins ; but since these can not be...

Resource Type:

Technical Report

Full Text:

escape of weevils. (Original.) larvae, pupa, and adults. Some of the larvae apparently die from disease
The two-lined chestnut borer

Creator:

Chittenden, F. H. (Frank Hurlbut), 1858-1929 and United States. Division of Entomology

Abstract:

Recent years have witnessed extensive destruction of forest growth, particularly of pine, spruce, and chestnut, in portions of the United States east of the Rocky Mountains. This injury has been very generally attributed to insects, and there is evidence that certain wood and bark-boring species have largely contributed to the...

Resource Type:

Technical Report

Full Text:

to a fungus disease, and it is possible that such is the case. The chestnut-boring species, however