Response of Foliar Sprays of Plant Growth Regulators and Micronutrients and Their Combinations on Morphological, Flowering and Yield Attributing Traits of Tomato at North -Bihar Condition

Tomato is a very important vegetable all over the world due to its nutrients enrichment and have considered as “poor man’s orange” worldwide. However, the crop is threatened with low yield and sub-standard quality fruits due to various biotic and abiotic, adverse climatic and poor nutrients status of soil. In the present study, an attempt was made to test the effects of foliar sprays of naphthalic acetic acid (NAA), gibberellic acid (GA3), zinc (Zn) and boron (B) on growth, yield and quality attributes of tomato var. Kashi Vishesh. Significant differences recorded in plant morphological parameters such as plant height, number of branches per plant, and number of leaves per plant including the number of branches at first fruit set and days to 50% flowering and yield attributing characteristics like average fruit weight (gm), equatorial diameter of the fruit (cm), polar diameter of the fruit (cm), fruit yield per plant (kg), fruit yield (t/ha) of tomato plants. The foliar spray of GA3 50ppm + ZnSO4 0.5% resulted in the highest plant height (82.11 cm and 124.23 cm), greatest number of branches per plant (10 and 13.4) and highest number of leaves per plant (160.1 and 199.1) at 60 and 75 DAT. In terms of yield attributes, it was demonstrated the maximum average fruit weight (65.02 g), equatorial diameter (5.23 cm), polar diameter (4.92 cm), fruit yield per plant (1.53 kg) and yield per hectare (29.31 tons). Conversely, foliar spray of GA3 at 50 ppm + Micro. mix. at 0.5% had shown nearby results of morphological and yield data. A rigorous statistical. Analysis using ANOVA was conducted and is comprehensively presented. These findings have the potential to contribute to the enhancement of tomato production in the specific Indo-Gangetic plains of North Bihar.