Sex Differentiation in Oil Palm: Effects of Growth Regulators

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Abstract
Gibberellic acid is shown to increase the production of male inflorescences, and reduce production of females, in the oil palm, Elaeis guineensis Jacq. Ethephon and α-naphthyleneacetic acid also have effects on sex ratio, but it is suggested that these may be indirect effects, in contrast to that of gibbereffic acid which is considered to be a direct effect on the process of sex differentiation. 2-Chioroethyl trimethylammonium chloride had no effect on sex ratio.