Washington navel fruit drop: Effects of 2,4-D on drop of sound and unsound oranges when sprays were applied in the late fall and winter
California Agriculture 6(11):7-15.
Published November 01, 1952
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Sound Washington Navel orange fruit was the only type in which drop was consistently reduced by a highly significant amount—1 % level of probability—in studies in orchards near Pomona and Redlands.