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All Journal Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan
Poppy Khairunnisa
Bina Insan University
Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences

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Rizobakteri Antagonis Sebagai Agen Biokontrol Fusarium oxysporum f.sp. capsici Penyebab Layu Fusarium Pada Cabai Merah (Capsicum annuum L.) Selviana Anggraini; Rahil Ade Rifqah; Pajri Ananta Yudha; Dini Puspita Yanty; Poppy Khairunnisa; Sumini; Aslan Sari Thesiwati
Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Vol 24 No 1 (2026): Jurnal Agroqua
Publisher : University of Prof. Dr. Hazairin, SH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32663/ja.v24i1.5507

Abstract

Fusarium wilt caused by Fusarium oxysporum f.sp. capsici is one of the most destructive diseases affecting red chili pepper cultivation because it significantly reduces plant growth and yield. Disease management that still relies on synthetic fungicides may increase environmental pollution and promote pathogen resistance; therefore, environmentally friendly control alternatives are required. This study aimed to evaluate the effectiveness of several local rhizobacterial isolates as antagonistic agents against Fusarium wilt in red chili pepper. The novelty of this study lies in the evaluation of indigenous rhizobacterial isolates with dual functions as antagonistic agents against Fusarium oxysporum f.sp. capsici and as plant growth-promoting rhizobacteria (PGPR) capable of enhancing red chili pepper growth under both in vitro and in vivo conditions. The results showed that all rhizobacterial isolates significantly inhibited pathogen growth. Isolate UBI-Rz04 exhibited the highest inhibition rate of 85.78% and the lowest fungal biomass (0.03 g) under in vitro conditions. In the in vivo assay, isolate UBI-Rz01 reduced disease incidence to 44.67%, compared with 80.00% in the control, and suppressed the pathogen population to 3.33 × 10⁵ CFU/g soil. Rhizobacterial application also improved red chili pepper growth. These findings indicate that local rhizobacteria have strong potential as environmentally friendly biological control agents for sustainable red chili pepper cultivation.
BIOKONVERSI LIMBAH PERTANIAN MENJADI BIOPESTISIDA RIZOBAKTERI ANTIFUNGAL Selviana Anggraini; Sri Murtini; Indri Vajry; Poppy Khairunnisa; Paisal Ansiska
Jurnal Agroqua: Media Informasi Agronomi dan Budidaya Perairan Vol 23 No 2 (2025): Jurnal Agroqua
Publisher : University of Prof. Dr. Hazairin, SH

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32663/ja.v23i2.5386

Abstract

Modern agriculture faces increasing challenges from soil-borne fungal pathogens such as Fusarium oxysporum, Rhizoctonia solani, and Sclerotium rolfsii, which cause severe root and wilt diseases and significantly reduce crop productivity. This study employed a qualitative–descriptive approach supported by controlled laboratory experiments to evaluate the potential of agricultural waste as an alternative, low-cost substrate for producing antifungal rhizobacterial biopesticides. Six types of agricultural waste—rice straw, rice husk, corn cob, sugarcane bagasse, coffee husk, and soybean residue—were assessed based on their C/N ratio, lignin content, biodegradability, and nutrient availability. The results indicated that substrates with moderate C/N ratios (15–25) and low lignin content, particularly soybean residue and sugarcane bagasse, promoted optimal rhizobacterial colonization, robust biofilm formation, and high production of antifungal metabolites such as chitinase and siderophores. Rhizobacteria cultured on soybean residue exhibited the strongest inhibition zone against Fusarium oxysporum (20.5 mm) and the highest plant protection efficacy (88%), with biopesticide stability maintained for up to 120 days. Two conceptual models, Substrate Structure Colonization (SSC) and Media Metabolite Effectiveness (MME), are proposed to explain the relationship between substrate structure, metabolite biosynthesis, and biopesticide performance. These findings provide a sustainable strategy for converting agricultural waste into high-value bio-based inputs, supporting circular economy practices and green agriculture initiatives.
Co-Authors Aslan Sari Thesiwati Dini Puspita Yanty Indri Vajry Paisal Ansiska Pajri Ananta Yudha Rahil Ade Rifqah Selviana Anggraini Sri Murtini Sumini Sumini