Productivity of Tomato (Lycopersicon esculentum Mill.) as influenced by Plant Growth Regulators under Protected conditions

Author: Kumar Virendra, Rajiv, Singh Y.K., Singh Lokendra and Verma Arun Kumar

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Abstract

Protected cultivation offers several advantages to produce vegetables of high quality and yields, but tomato crop often faces problems of poor fruit setting due to poor or negligible release of pollens for pollination and fertilization thereby affecting fruit set and ultimately the yield. Plant growth regulators play an important role in increasing the growth, yield and quality of the produce if applied in suitable forms and at appropriate concentrations. The field experiment was conducted at Vegetable Research Farm, Kalyanpur of Chandra Shekhar Azad University of Agriculture and Technology, Kanpur, India during two consecutive rabi seasons of 2019-20 and 2020-21, to find out the effect of PGRs and their spray schedules on tomato. The experiment was laid out in Factorial Randomized Block Design (FRBD) with 27 treatment combinations and replicated thrice under insect proof net house. The experiment comprised nine levels of plant growth regulators viz., GA3 @ 50 ppm, GA3 @ 75 ppm, GA3 @ 100 ppm, NAA @ 20 ppm, NAA @ 30 ppm, NAA @ 40 ppm, 4-CPA @ 20 ppm, 4-CPA @ 30 ppm and 4-CPA @ 40 ppm and three spray schedules viz., at 30 and 45 DAT, at 30, 45 and 60 DAT and at 30, 45, 60 and 75 DAT. The tomato hybrid ‘NS- 4266’ was used in experiment. Results of the experiment revealed that the application of GA3 @ 75 ppm recorded significantly highest no. of fruit clusters per plant (13.287 and 13.936), no. of fruits per cluster (13.300 and 14.211), no. of fruits per plant (76.744 and 77.480), average fruit weight (88.924 and 88.899 g), equatorial diameter of fruits (7.110 and 7.063 cm), polar diameter of fruits (6.234 and 6.192 cm), fruit yield per plant (12.223 and 13.208 kg), fruit yield per 1000m2 (258.470 and 262.413 q) during both the years. In case of spray schedules, the plants were sprayed at 30, 45, 60 and 75 days after transplanting (DAT) produced significantly highest values of all the yield attributing traits. Based on mean values of two years study, the significantly highest fruit yield of 262.735 q/1000m2was observed with the treatment combination of application of GA3 @ 75 ppm and spray schedule of 30, 45, 60 and 75 days after transplanting (DAT). Hence, it may be recommended for higher productivity from tomato crop under protected conditions.

Keywords

Protected cultivation, PGRs, Productivity, Spray schedule and Tomato

Conclusion

From the present findings, it can be inferred that the of foliar application of GA3 @ 75 ppm at 30, 45, 60 and 75 days after transplanting (DAT)was found suitable for realizing optimum fruit yield of tomato under insect proof net house. Hence, it may be recommended for higher productivity from tomato crop under protected conditions in central plain zone of Uttar Pradesh.

References

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How to cite this article

Kumar Virendra, Rajiv, Singh Y.K., Singh Lokendra and Verma Arun Kumar (2023). Productivity of Tomato (Lycopersicon esculentum Mill.) as influenced by Plant Growth Regulators under Protected conditions. Biological Forum – An International Journal, 15(3): 749-753.