STUDIES ON THE EFFECT OF FOLIAR APPLICATION OF PLANT GROWTH REGULATORS ON GROWTH, YIELD AND SEED QUALITY IN TOMATO (Solanum lycopersicum L.)

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Date
2019-09
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UHF,NAUNI
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ABSTRACT The present investigation entitled, “Studies on the effect of foliar application of plant growth regulators on growth, yield and seed quality in tomato (Solanum lycopersicum L.)” was carried out at the experimental farm of Department of Seed Science & Technology, Dr Yashwant Singh Parmar University of Horticulture and Forestry, Nauni, Solan (HP) during 2018 to 2019. The experiment was laid out in Randomized Block Design in the field and in Completely Randomized Block Design in laboratory with three replications of each treatment. The treatments comprised of T1 -GA3 25 ppm, T2 -GA3 50 ppm, T3 -GA3 75 ppm, T4 -GA3 100 ppm, T5 -NAA 10 ppm, T6 -NAA 20 ppm, T7 -NAA 30 ppm, T8 -NAA 40 ppm and T9 –Control. The observations were recorded on plant height (cm), number of flowers per plant, number of fruits per plant, fruit weight (g), fruit yield per plant (kg), fruit yield per plot (kg), fruit yield per ha (q), number of seeds per fruit, seed yield per plant (g), seed yield per plot (g) and seed yield per hectare (kg). While the observations recorded in the laboratory were 1000 seed weight (g), germination (%), speed of germination, seedling length (cm), seedling dry weight (mg), SVI-I and SVI-II. The results revealed that the treatment T4 -GA3 100 ppm recorded higher values for plant height (159.0 cm), number of flowers per plant (55.13), number of fruits per plant (30.87), fruit weight (90.92 g), fruit yield per plant (2.63 kg), fruit yield per plot (29.84 kg), fruit yield per ha (736.74 q/ha), seed yield per plant (7.0 g), seed yield per plot (77.03 g) and seed yield per hectare (190.21 kg/ha) which was closely followed by T3- GA3 at 75 ppm. The number of seeds per fruit was recorded maximum in the treatment T2- GA3 50 ppm (109.37) followed by T8 -NAA 40 ppm (109.20). The highest values for seed quality parameters viz. 1000 seed weight (3.03 g), germination (93.25 %), speed of germination (21.10), seedling length (19.80 cm), seedling dry weight (1.70 mg), SVI-I (1854.43) and SVI-II (158.95) were observed in T4 -GA3 100 ppm. The treatment T8 -NAA 40 ppm gave highest benefit: cost ratio of 8.74:1 which was followed by T3 (7.84:1).
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