Influence of Foliar Spray of Plant Growth Regulator and Nutrients on Yield and Yield Attributing Traits on Guava (Psidium guajava L.) cv. Apple Colour

The most substantial tropical and subtropical fruit crop in India is the guava (Psidium guajava L.), which is a member of the Myrtaceous family. It is indigenous to Tropical America, spanning from Mexico to Peru, and through time, many nations have turned to it as a commercially successful fruit crop. Nutrients and PGR play a crucial role in fruit growth and yield attributes their deficiency can significantly impact the yield, productivity, and quality of fruits. Therefore, keeping these points in view, the present investigationThe study was conducted on a 10-year-old guava plant orchard grown in a (3*3) high density plantation at the Fruit Research Station, Imaliya, Department of Horticulture, Jawaharlal Nehru Krishi Vishwavidyalaya (J.N.K.V.V.), Jabalpur (M.P.) during mrig-bahar 2022-23. The field experiment was designed using FRBD (Factorial randomized block design) and included 20 treatment combinations of PGR (salicylic acid) and various nutrients with three replications. The findings showed that among all the fruit development parameters, i.e., fruit length (6.89 cm), fruit width (7.62 cm), average fruit weight (238.50 g), fruit volume (215.50 ml), and specific gravity (1.11g/cc), were achieved greatest in the treatments combination of (Salicylic acid 300 ppm + KNO3 0.5%) and all the yield attributing characteristics i.e., number of fruits per plant (97.83 fruit), yield / plant (22.40 kg) and yield / hectare (248.86 qt). The highest value was found in the treatment combination (Salicylic acid 200 ppm + Borax 0.5%) followed by (Salicylic acid 200 ppm + ZnSO4 0.5%) as compare (control).