EFFECT OF PLANT GROWTH REGULATORS AND MICRONUTRIENTS ON FLOWERING AND FRUITING ATTRIBUTES OF GUAVA (PSIDIUM GUAJAVA L.) CV. L-49

Abstract

The present investigation entitled “Studies on effect of foliar feeding of micronutrients and plant growth regulators on fruiting behavour, yield, quality and storability of Guava (Psidium guajava L.) fruits cv. L-49” was carried out during the year 2023-24 and 2024-2025 at Main Experiment Station, Department of Fruit Science, College of Horticulture and Forestry, ANDUAT, Kumarganj, Ayodhya, Uttar Pradesh, India. The treatments comprised of the spraying of different PGRs and micronutrients to study the flowering and fruiting attributes of guava fruits cultivar L-49. The experiment was conducted in randomized block design (RBD) with eleven treatments and three replications. The experiment consisted of eleven treatments including T₁ (Control), T₂ (ZnSO₄ 0.5%), T₃ (Borax 0.5 %), T₄ (NAA 40 ppm), T₅ (GA₃ 40 ppm), T₆ (ZnSO₄ @ 0.5 % + Borax @ 0.5%), T₇ (ZnSO4 0.5% + NAA 40 ppm) T₈ (ZnSO4 0.5% + GA₃ 40 ppm),  T₉  (Borax 0.5% + NAA 40 ppm) T₁₀ (Borax 0.5% + GA₃ 40 ppm) T₁₁ (GA₃ 40 ppm + NAA 40 ppm) Were used for this study. The minimum days taken to 50% fruit set (8.56 days), maximum fruit set % (65.90 %), minimum fruit drop % (29.24 %) and maximum fruit retention (61.48 %) were observed with the foliar application of T₁₁ (GA₃ 40 ppm + NAA 40 ppm) under the agroclimatic condition of Eastern Uttar Pradesh of India.

Keywords
Guava, ZnSO4, NAA, Borax, Retention