Concentrations of 0,10, 20, 40 and 80mg/L of 3,5,6-TPA (3,5,6-trichloro-2-piridil-oxiacetic acid), as ester formulation, were used for thinning of young fruits of acid lime'Tahiti' (Citrus latifolia Tanaka) in ecological conditions of the São Paulo State. The 3,5,6-TPA, in 10mg/L concentration, was the most efficient treatment for use in the crop. Higher concentrations caused hard damage to the plants. This concentration, applied after flowing in October, caused a decrease of 65% on yield in following February. However, yields on the subsequent months did not differ among them. The 10mg/L concentration caused fruit elongation, skin thickness and reduction of Brix, at the harvest epoch.
chemical thinning; plant growth regulators; growth regulators; acid lime
