The walnut husk fly: Pest new in northern California found in Sonoma valley and near Santa Rosa
California Agriculture 10(5):13-13.
Published May 01, 1956
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The walnut husk fly—Rhagoletis completa Cresson—was not known to exist in northern California until its discovery in a small walnut orchard near Sonoma in 1954. Because the find was made late in the fall, there was no opportunity to study the distribution of the pest in northern California that season.