The present study was conducted to observe the impact of gibberellic acid on physiological growth, yield & lycopene content of tomatoes in open field at Horticulture Farm of Krishi Vigyan Kendra Varanasi during (2020-21). The tomato Narendra Tomato-2 variety used for this experiment, Six treatments with four concentration levels of gibberellic acid (i.e. GA3; 15ppm, 30ppm, 45ppm, 60ppm) set in randomized block design (RBD) with 03 replication. The plants are sprayed at 20, 40, 60 days interval after transplanting. The outcome results shows that highest plant height, number of leaves, number of fruits, fruit weight, lycopene content, ascorbic acid & total soluble solids(TSS) was found maximum in GA3 60ppm, compare with unsprayed tomato plants. Our result indicates that spraying of GA3 with 60 ppm concentration is more economical & effective to boost the fruit set and qualitative production tomatoes in semi arid condition of eastern U.P.

Lycopersicon esculentum, phytohormone GA3, lycopene, ascorbic Acid, T.S.S.

It can be concluded that gibberellic acid considerably influenced the vegetative growth, quality, ascorbic acid, lycopene content & yield with the treatment GA3@60ppm. Among the various concentration treatments of GA3 applied on plants, because the tomato plants sprayed with GA3@60ppm exhibited most positive result in all the parameters relating to enlarged plant height, range of leaves, range of fruit, contemporary fruit weight, ascorbic acid, T.S.S. and lycopene content. Thus applying the plant growth regulators like GA3 revealing because the most promising PGR and with success improved the fruit size, growth and additionally keeping the quality of fruit which helps farmers in cultivating tomato in hostile/inauspicious climatic situation for the production of considerably good fruit yield (as today’s global demand) by increasing qualitative, vegetative and procreative growth & reducing flower/fruit drops

Vinod Singh, Vineeta Singh, Binayak P. Shahi, Naveen Singh and S.P.S. Somvanshi (2022). Impact of Gibberellic Acid on Physiological Yield and Quality Attributes of Tomato (Lycopersicon esculentum Mill.) Underneath Semi-Arid Condition of Eastern U.P.. Biological Forum – An International Journal, 14(2): 400-402.