Impact of foliar spray of micronutrients and plant growth regulators on growth and yield of Guava (Psidium guajava L.) cv. L-49

Guava (Psidium guajava L.), Botanically, guava belongs to the family Myrtaceae. Its basic chromosome number is 11 (2n 2x = 22), foliar application is based on the principle that the nutrients are quickly absorbed by leaves and transported to different parts of the plant to fulfil the functional requirement of nutrition. Experiment was carried out at the Horticultural Research Farm-1, Department of Horticulture, Babasaheb Bhimrao Ambedkar University (A Central University), Vidya Vihar, Rae Bareli Road, Lucknow- 226025 (U.P.), India during the year 2020-2021, to study the impact of foliar spray of micronutrients and plant growth regulators on guava fruit performance. Observations are recorded fruit set, fruit retention, fruit length, fruit width, fruit weight, fruit volume and fruit yield, applications of foliar spray with Borax 0.5%+GA3 40 ppm is most effective in performance of guava fruits viz, fruit set (70.28 %), fruit retention (61.35 %), fruit length (8.68 cm), fruit width (7.83 cm), fruit weight (139.96 g) fruit volume (125.80 ml) and fruit yield (64.85 kg/tree).