In this article:
Benzothiazole-2-oxyacetic acid (BTOA) was applied to bunches of grapes(v. Shiraz) at different times during their development and its effect on their subsequent growth was followed by measuring changes in berry weight, reducing sugars, malate, and tartrate.
It lengthened the slow growth phase of berry development and this delayed ripening. It had no effect on the course of the first or second rapid growth stages.
No consistent effect of BTOA on the tartrate content of grapes was apparent.
The response of grapes to treatment with BTOA and other auxins is discussed in relation to growth and senescence of the grape berry.
Growth and Senescence of the Grape Berry
1968, Australian Journal of Agricultural Research, vol 19, pages 939 – 945
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