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The Spruce Gall Aphid Adelges Cooleyi (Gill) In Utah., Lagrande Stirland
The Spruce Gall Aphid Adelges Cooleyi (Gill) In Utah., Lagrande Stirland
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This paper is the result of research started on the Campus of the Utah State Agricultural College in the Spring of 1928. It is the intention of the writer to give the economic importance of the insect in the State; kind and extent of damage done by the insect, life history and control of the insect as far as it has been found.
The problem is not completed, nor is all the material included the results of the writer's own investigation. However, it has been the object of the writer to study forms as they exist in Utah, and to …