Western Australia, Pre-harvest drop, Washington navel oranges, 2 4-D spray, Synthetic plant hormones, Naphthalene acetic acid, N.A.A, 2 4-DichIorophenoxyacetic acid, citrus fruit
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The uses of various synthetic "plant hormones" in agriculture are many—one of the most generally known of these uses being their action in reducing pre-harvest drop of fruit. Naphthalene acetic acid, commonly known as N.A.A. is widely used for this purpose with apples, but 2,4-DichIorophenoxyacetic acid, commonly known as 2,4-D, is much more effective with citrus fruit.
Halse, N J.
"Reduction of pre-harvest drop of washington navel oranges by 2,4-D sprays,"
Journal of the Department of Agriculture, Western Australia, Series 3: Vol. 1:
3, Article 15.
Available at: https://library.dpird.wa.gov.au/journal_agriculture3/vol1/iss3/15