During the past 10 or 15 years alfalfa-seed has constituted the major crop in western Millard County and in most of that portion of the Uintah Basin which is situated in Utah. In these sections of the state various natural conditions generally have been favorable for seed production. Within the last five years seed growers have thought that one of the principal limiting factors of the industry has been the alfalfa-seed chalcis-fly. Accordingly, a preliminary survey in the seed districts of the state was made in the fall of 1925 by the Utah Agricultural Experiment Station.
The greater part of the material contained in this publication is based upon the results of investigational work done during the 4-year period, 1926 to 1929, inclusive, and for the most part, at the Uintah Basin Alfalfa-seed Substation at Fort Duchesne, Utah.
Sorenson, Charles J., "Bulletin No. 218 - The Alfalfa-Seed Chalcis-Fly in Utah: 1926-29, Inclusive" (1930). UAES Bulletins. Paper 177.