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All Journal Agroprimatech
Martha Adiwaty Sihaloho
Universitas Amir Hamzah Medan
Agriculture, Biological Sciences & Forestry Environmental Science

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Test Potential of Selected Biological Control Fungi Against Phyllosticta zingiberi Under Laboratory Conditions Martha Adiwaty Sihaloho; Hapsoh; Hasanuddin
Agroprimatech Vol. 9 No. 2 (2025): Agroprimatech
Publisher : Prodi Agroteknologi Fakultas Agro Teknologi Universitas Prima Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34012/agroprimatech.v9i2.8050

Abstract

Leaf spot disease is one of the major constraints in red ginger (Zingiber officinale Rosch) cultivation, causing necrosis on leaves that reduces photosynthetic capacity and rhizome productivity. This study evaluated the antagonistic activity of four biological control agents Trichoderma koningii, Trichoderma harzianum, Gliocladium spp., and Gliocladium virens, against Phyllosticta zingiberi under in vitro conditions. The experiment was conducted at the Plant Pathology Laboratory, Faculty of Agriculture, University of Sumatera Utara, Medan, from January to March 2010. A Completely Randomized Design (CRD) with five treatments and five replications was used. The results showed that the highest growth inhibition was observed in Gliocladium spp. (46.23%) and T. harzianum (46.15%), followed by T. koningii (41.38%) and G. virens (27.24%). The control exhibited the lowest inhibition (6.43%). The observed suppression is attributed to mechanisms including mycoparasitism, production of antifungal metabolites, and competition for space and nutrients. The findings indicate that Gliocladium spp. and T. harzianum are the most effective biological control agents for managing leaf spot disease in red ginger
BIOLOGICAL CONTROL OF LEAF SPOT DISEASE (Phyllosticta zingiberi) ON RED GINGER (Zingiber officinale Rosc.) USING BIOCONTROL AGENTS Martha Adiwaty Sihaloho; Hapsoh; Hasanuddin
Agroprimatech Vol. 10 No. 1 (2026): Agroprimatech
Publisher : Prodi Agroteknologi Fakultas Agro Teknologi Universitas Prima Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.34012/agroprimatech.v10i1.8510

Abstract

Leaf spot disease is one of the major constraints in red ginger (Zingiber officinale Rosc.) cultivation, causing significant economic losses to farmers and reducing national export value. The disease is suspected to be seed-borne, as the pathogen can survive in infected planting materials. This study aimed to evaluate the effectiveness of the biocontrol fungi Trichoderma koningii, T. harzianum, Gliocladium spp., and G. virens in suppressing Phyllosticta zingiberi, the causal agent of leaf spot disease.. Additionally, the study assessed different application methods of biocontrol agents in controlling the disease. The study was conducted at the Experimental Field of the Faculty of Agriculture, Universitas Amir Hamzah, Medan Estate Village, Percut Sei Tuan District, Deli Serdang Regency, at an altitude of approximately 25 m above sea level, from January to August 2010. The study consisted of two main stages: (1) identification of the causal pathogen of leaf spot disease in red ginger, and (2) in vitro antagonistic testing of biocontrol agents against P. zingiberi. The results showed that the application of antifungal suspension of Gliocladium virens on leaves was relatively more effective in inhibiting the growth of P. zingiberi compared to other tested biocontrol agents
Co-Authors Hapsoh Hasanuddin