A field trial was conducted to assess the effectiveness of different combinations plant growth regulators (2,4-D and NAA) and nutrients (Boric acid and Urea) on qualitative and yield parameters of eight year old Acid lime plants during 2019-20 and 2020-21 at Agro techno park of Krishi Vigyan Kendra, College of Agriculture, Rajmata Vijayaraje Scindia Krishi Vishwa Vidyalaya, Gwalior (M.P.). The experiment was laid out in randomized block design with 25 different treatment combinations along with control. The treatments consisted of foliar application of growth regulators viz., NAA, and 2,4-D and nutrients such as boric acid and Urea. Results have indicated that the foliar spray of T19-Urea 2%+2,4-D 15ppm + NAA 20ppm + Boron 0.5% was found superior with respect to quality parameters like fruit volume at harvest (39.54), juice content (51.29) ml and TSS (7.49) Brix) and acidity percentage (8.04) and TSS: Acid ratio (1.11). The plant growth regulators and nutrients are very much essential for growth and development of acid lime. The study denotes that post harvest parameters like physiological weight loss after 5, 10 and 15 days of storage were found to be reduced by application of Urea 2%+2, 4D 15ppm+NAA 20ppm+Boron 0.5% and specific gravity after 5, 10 and 15 days of storage was found to be increased when compared to control.

Acid lime, urea, boric acid, 2,4-D, physico chemical, growth regulators, post harvest

On the basis of results obtained in present investigation it is concluded that foliar application of T19-Urea 2%+2,4-D 15ppm + NAA 20ppm + Boron 0.5% was found to be significantly superior to all the treatments under study and resulted in increase in fruit volume, juice percentage, TSS Brix, and TSS: Acid ratio and specific gravity whereas reduced the acidity percentage, physiological weight loss as compared to control. Hence this treatment combination seems to be useful or improving the quality and post harvest parameters of acid lime for consumption of its by products like squash, marmalades, pickles and help farmers to get a higher price for their produce thereby increasing their income.

Shrikunwar, Karan Vir Singh, Khusboo Namdev and Rajesh Lekhi (2023). Influence of Foliar Application of Plant Growth Regulators and Nutrients on Physico Chemical and Post Harvest Traits of Acid Lime (Citrus aurantifolia Swingle). Biological Forum – An International Journal, 15(12): 480-484.