Effect of foliar application of biofertilizers on productivity and quality of guava (Psidium guajava L.)

Abstract

This study examines the impact of foliar biofertilizer applications on the yield and quality parameters of guava (Psidium guajava L.) variety L-49. The results revealed significant improvements in both yield and quality parameters of guava with biofertilizer applications compared to the control. Among the treatments, T₇ (Trichoderma viride 10%) emerged as the most effective, significantly enhancing yield and quality parameters compared to the control (T₁ ). T₇ recorded the highest number of fruits per plant (96.50), with increases of 50% over the control, which is at par with Trichoderma viride 5%, Pseudomonas 10% and Pseudomonas 5%. Trichoderma viride at 10% exhibited the highest yield (21.95 kg/plant), with increases of 99% over the control, which is at par with Trichoderma viride 5%. It also demonstrated superior fruit dimensions, weight (226.99 g), and pulp percentage (96.29%), reflecting enhanced productivity. In terms of fruit quality, T₇ achieved the highest TSS (12.80 °Brix), TSS: acid ratio (39.03), ascorbic acid content (234.60 mg/100g), and sugar content (9.60%), while maintaining balanced acidity (0.328%).