Effect of foliar nutrition of micronutrients and plant growth regulators on yield and quality of guava (Psidium guajava L.) cv. Allahabad Safeda

Abstract

A field experiment was conducted during 2017-2019 at Central Horticultural Experiment Station-ICAR-IIHR, Bhubaneswar. The experiment was laid out in a Factorial Randomized Block Design with thirteen treatments and two season (Rainy and Winter). The results obtained from investigation shows that the foliar spray of SA@100ppm was found to be superior for increasing yield (31.13 and 17.73 kg/tree) during rainy and winter season, respectively. Maximum (6.49 and 6.59 cm) fruit length and fruit diameter were recorded under the foliar application of SA@100 ppm for both the season, respectively. Different quality parameters such as total soluble solid, ascorbic acid and reducing sugar were found to be higher under the treatment Borax@ 0.6%. Similarly, titrable acidity was also reduced significantly over the control with borax and SA at higher concentrations. Ascorbic acid was found superior under the treatment Borax 0.6% (194.71 and 190.16 mg/100g) during winter and rainy crop, respectively and minimum was recorded under control treatment.