Growth regulators and micro nutrients play an imperative role enhanced plant growth and quality of the fruit. Sustainable crop production require the adoption of proper inputs for the growth and quality of the produce, hence to acquire the better understanding of use of growth regulators and micronutrients with its proper dose and method following experiment was done. An experiment was conducted to find out the effect of different plant growth regulators and micronutrients on tomato during the rabi season of 2019 at the AICRP on Vegetable Crops, College of Agriculture, Odisha University of Agriculture and Technology (OUAT), Bhubaneswar. The experiment was conducted on tomato variety Kalinga tomato-121. There were 12 treatment combinations with three replications using Randomized Block Design i.e. T1: Borax @ 0.2%, T2: Zinc sulphate @ 0.5%, T3: Micronutrient mixture @ 0.5% (Multiplex Multimax), T4: NAA 50 ppm, T5: NAA 50 ppm + Borax @ 0.2%, T6: NAA 50 ppm + Zinc sulphate @ 0.5%, T7: NAA 50 ppm + Micronutrient mixture @ 0.5% (Multiplex Multimax), T8: GA3 50 ppm, T9: GA3 50 ppm + Borax @ 0.2%, T10: GA3 50 ppm + Zinc sulphate @ 0.5%, T11: GA3 50 ppm + Micronutrient mixture @ 0.5% (Multiplex Multimax), T12: Control (without growth regulators and chemicals). According to the results, the maximum plant height (48.50 cm), number of leaves per plant (42.53), stem girth (3.20cm) and number of branches per plant (6.06) were found in treatment T11- GA3 50 ppm + Micronutrient mixture @ 0.5% (Multiplex Multimax) whereas the minimum for all the parameters were found in control. Minimum acidity % of tomato was recorded in treatment T11- GA3 50 ppm + Micronutrient mixture @ 0.5% (Multiplex Multimax) i.e. 0.43% and maximum acidity % was found in control-T12 (0.52%) From the above-mentioned investigations it can be concluded that use of GA3 50 ppm + Micronutrient mixture @ 0.5% (Multiplex Multimax) is best for tomato cultivation during rabi season in Odisha condition.

Tomato, Growth regulators, Micronutrients, NAA, GA3, Borax, Zinc sulphate

It can be concluded that applying the plant growth regulators resulted increased vegetative growth of tomato. GA3 50 ppm + Micronutrient mixture @ 0.5% (Multiplex Multimax) given a considerable influence on all the vegetative and quality parameters relating to plant height, number of leaves per plant, stem girth, number of branches per plant and acidity % among the various treatment combinations. Thus, applying the plant growth regulators like GA3 and micronutrient mixture revealing which helps farmers in cultivating tomato in hostile climatic situation by making better availability of macro and micro nutrients and better metabolic activity. Ultimately the increased vegetative growth can lead to increased production of tomato and qualitative production of tomato.

Himasweta Nayak, Sunil Kumar Dash, Gouri Shankar Sahu, Pradyumna Tripathy, Simanta Mohanty and Swarnalata Das (2022). Effect of Growth Regulators and Micronutrients on Growth and Quality Parameters of Tomato (Solanum lycopersicum L.). Biological Forum – An International Journal, 14(4a): 810-813.