Effects of Vaporous Naphthoxyacetic Acid on Development of Tomato Fruits, with Special Reference to Their Vitamin C Content

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Abstract
In expts. with tomato, the use of vaporized B]-naphthoxyacetic acid under greenhouse conditions resulted in the development of a high % of seedless fruits (50-98%). With the Marglobe var. the response was readily obtained by fumigating the plants in position when the earliest flowers of each successive cluster opened. This method, although causing temporary epinasty to a slight degree, did not appreciably affect vegetative growth of the plants. With the Bonny Best var. a slight increase in fruit set was observed, and this effect was limited to flowers of the cluster which were well developed but not yet open at the time of treatment. With respect to vitamin C content, the nutritional value of ripe fruits that developed from treated flowers was equal to that of fully seeded untreated fruits grown under the same conditions.

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