Safety and effectiveness of SV59 for enhancing okra crop production

Abstract

The study evaluated the bio-efficacy of SV59 bio-stimulant on growth, yield, and soil nutrient status of okra under field conditions at ZAHRS, KSNUAHS, Shivamogga (December 2023-May 2024). The experiment was laid out in a randomized block design with seven treatments replicated thrice. SV59 was applied as soil drench at 20 and 50 DAS at 0-2.00 L acre⁻¹, with positive and negative controls. Growth parameters, physiological traits, yield attributes, phytotoxicity and soil properties were assessed and analysed using ANOVA (P = 0.05). SV59 at 1.50-2.00 L acre⁻¹ significantly enhanced plant height (82.2 cm), leaf area (4170 cm²), LAI (1.158), total chlorophyll (2.15 mg g⁻¹), fruit weight (10.29 g) and yield (11.75 t ha⁻¹) over control. No phytotoxicity symptoms were recorded. Post-harvest soil showed slight nutrient decline, indicating efficient nutrient uptake. SV59 effectively improved okra growth and productivity without adverse effects; 1.50-2.00 L acre⁻¹ is recommended.