Int.J.Curr.Microbiol.App.Sci (2022) 11(01): 405-411 405 Original Research Article https://doi.org/10.20546/ijcmas.2022.1101.049 Effect of Plant Growth Regulators and Micronutrients Spray on Growth, Fruit Yield and Quality of Acid Lime (Citrus aurantifolia Swingle) cv. Ganganagar Lime – 1 Shubham Pandey 1 , Nidhika Thakur 1* , Akhilesh Kumar Srivastava 1 , Om Prakash 1 and Satya Vrat Dwivedi 2 1 Department of Fruit Science, 2 Department of Vegetable Science, College of Horticulture, Banda University of Agriculture and Technology, Banda, U.P., India *Corresponding author ABSTRACT Introduction Acid lime (Citrus aurantifolia Swingle) is the third most important fruit crop next to mandarin and sweet orange. It originated in India and spread all over the world, commonly known as “Lime” also called as “Nimbu” in local language. Limes are rich source of bioflavonoid, acid and volatile oils, good source of antioxidant and also contain small amounts of riboflavin, niacin, folate, phosphorus and magnesium, hence a very good source of nutrients. The total area, production and productivity of acid International Journal of Current Microbiology and Applied Sciences ISSN: 2319-7706 Volume 11 Number 01 (2022) Journal homepage: http://www.ijcmas.com The investigation was carried out at the experimental orchard, Department of Fruit Science, Banda University of Agriculture and Technology, Banda during 2020-21. The experiment was planned in RBD having 10 treatments with 3 replications consisting of different combinations of plant growth regulators and micronutrient spray on acid lime cv. Ganganagar Lime – 1 to improve the yield of good quality fruits. Among the plant growth characteristics, the maximum increment in trunk girth (3.55 cm) were recorded with the treatment T 8 - GA 3 (75 ppm) + ZnSO 4 (1%) + FeSO 4 (1%) and maximum leaf area (24.56 cm 2 ) were observed with the treatment T 9 NAA (100 ppm) + ZnSO 4 (1%) + FeSO 4 (1%). Whereas the maximum yield (10.01 kg/plant) and minimum fruit drop (22.85 %) were observed with the treatment T 10 - GA 3 (75 ppm) + NAA (100 ppm) + ZnSO 4 (1%) + FeSO 4 (1%). The fruit quality characteristics like maximum average fruit weight (28.39 g), fruit length (41.26 mm), fruit width (40.51 mm), TSS (7.2 º Brix), ascorbic acid (30.20 mg/100g) and juice percentage (52.73 %) were also recorded with the treatment T 10 - GA 3 (75 ppm) + NAA (100 ppm) + ZnSO 4 (1%) + FeSO 4 (1%). While, the maximum titratable acidity (6.81 %) were recorded with the treatment T 9 - NAA (100 ppm) + ZnSO 4 (1%) + FeSO 4 (1%). The growth, yield and fruit quality of acid lime improved a lot as compared to untreated plants and the spray of GA 3 (75 ppm) + NAA (100 ppm) + ZnSO 4 (1%) + FeSO 4 (1%) was recorded as the best treatment for the plants. Keywords Ganganagar Lime – 1, Foliar spray, GA3, NAA, ZnSO 4 , FeSO 4 Received: 08 December 2021 Accepted: 31 December 2021 Available Online: 10 January 2022 Article Info