Publisher's Synopsis
Excerpt from Entomological Phases of the 1961 Lodgepole Needle Miner Control Project in Yosemite National Park
The principal entomological jobs were (1) to determine when the popu lation reached the proper stage of development for Spraying, and (2) to measure the degree of control attained. This work was done by the Experiment Station, which assisted the Park on the technical phases of the project.
Needle miner development during the late larval, pupal, and early adult stages was determined by daily sampling throughout the control area, from.june 6 to August A. Spraying began as planned when about one-quarter of the needle miners reached the adult stage, and When it ended three-quarters of them were in this stage. The target date for starting Spraying was accurately predicted from the sampling data 1 month in advance.
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