Effectiveness of Biofilmed Biofertilizer with Balanced Phosphate Fertilizer Dosage in Suppressing Purple Blotch Disease Intensity and Increasing Garlic Yield on Andisol Soil in Tawangmangu

Mohammad Fikri Halim Madjid, Hadiwiyono Hadiwiyono, Sudadi Sudadi, Susilo Hamberg Poromarto

Abstract


Garlic productivity in Indonesia is often constrained by purple blotch disease (Alternaria porri) . A sustainable control alternative involves utilizing biofilmed biofertilizer (BiO2) combined with phosphate (P) fertilizer . This study aimed to assess the effectiveness of balancing BiO2 and P dosage in suppressing purple blotch disease intensity and increasing garlic yield on Andisol soil in Tawangmangu . The research was conducted from May to September 2024 using a single-factor Completely Randomized Design (CRD) with four treatments: P0 (0% P + 100% NK + BiO2), P1 (50% P + 100% NK + BiO2), P2 (100% P + 100% NK + BiO2), and P3 (100% NPK without BiO2) . Data were analyzed using ANOVA followed by DMRT at a 95% significance level . Results indicated that combining BiO2 with P fertilizer was highly effective; it suppressed leaf spot disease intensity by 49.47% and increased garlic yields by 20.91% compared to the control . This confirms that integrating BiO2 with appropriate P fertilization is a viable strategy for improving garlic productivity in Andisol soil .

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DOI: https://doi.org/10.20961/jbb.v5i2.114347

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