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The yield and quality of tomato largely depend on soil and climatic conditions and also on variety. Plant growth regulators function as chemical messengers for intercellular communication. In tomato, different growth regulators and zinc play a pivotal role in germination, root development, branching, flower initiation, fruiting, lycopene development, synchronization and early maturation, parthenocarpic fruit development, ripening, TSS, acidity, seed production etcetera. The field experiment was conducted at Sher-e-Bangla Agricultural University Farm, Dhaka, Bangladesh during October 2017 to April, 2018 to evaluate the effect of foliar application of IBA, GA3 and Zn on yield and quality of tomato . Single variety BARI Tomato-14 and foliar application of IBA 5 ml/L, GA3 5 ml/l and Zn were used to conduct this experiment. The experiment was laid out in Randomized Complete Block Design (RCBD) having three factors and replicated three times. Data were collected on chlorophyll content of leaf, number of flowers cluster per pant, number of fruit per plant, yield per hectare, Vitamin-C content and TSS% content. A statistically significant variation was recorded in terms of the above characters about yield and quality of tomato. All the characters shows maximum result in treatment of T7 (IBA+GA3+Zn).The treatment combination of T7 (IBA 5 ml / L, GA3 5 ml / L and Zn 1 kg/ha) and T4 (IBA 5 ml / L, GA3 5 ml / L) gave the maximum yield (100.00 t/ha) and the minimum yield (39.75 t/ha) was found from the treatment combination on T0 (control). The highest Vitamin C content (113.10 mg/100 gm) and highest TSS (%) (7.000) were found from T7 (IBA 5 ml / L, GA3 5 ml / L and Zn 1 kg/ha) than that of control under present experiment. So, it can be concluded that treatment combination of T7 (IBA 5 ml / L, GA3 5 ml / L and Zn 1 kg/ha) is the best for yield and quality of tomato and can be tested further under different field conditions.
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