Sreeram Suresh and Coimbatore Subramanian Shobana (2024) Isolation, characterization, and predatory activity of nematode-trapping fungus, Arthrobotrys oligospora PSGSS01. Isolation, characterization, and predatory activity of nematode-trapping fungus, Arthrobotrys oligospora PSGSS01, 36: 103297. pp. 1-6. ISSN 1018-3647

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Abstract

A research study was undertaken to find a fungus that could effectively trap and kill Meloidogyne spp., which are
root-knot nematodes that cause significant crop loss worldwide. Soil samples were collected and processed
appropriately for the isolation of nematode-trapping fungi. After a primary screening, a potential nematode-
trapping fungus, Arthrobotrys oligospora (Orbilia oligospora) PSGSS01 was selected for further investigation. Its
growth was tested under various conditions, including different media types, temperatures, and pH levels. Its
predatory activity on Meloidogyne incognita was also assessed in vitro. The fungus exhibited septate double-celled
conidiospores, trapping hyphae, and radiating and sparse mycelium. Optimal conditions for growth were found
to be at 25
◦
◦
C
◦
C and a pH of 4.0 and 5.0 on corn meal agar. The best temperature and pH for conidiospore
germination were 25
37
C and 5.0, respectively. The isolate could trap 94% of second-stage juveniles of
M. incognita, and 92% juvenile mortality was recorded in 120 h at 28
◦
C. Therefore, the study concluded that the
isolate A. oligospora (Orbilia oligospora) PSGSS01 could be used as a biological control agent against root-knot
nematodes.

Item Type: Article
Uncontrolled Keywords: Arthrobotrys oligospora Biological control Growth characteristics Meloidogyne incognita Nematode-trapping
Divisions: PSG College of Arts and Science > Department of Microbiology
Depositing User: Dr. B Sivakumar
Date Deposited: 10 Dec 2025 05:53
Last Modified: 10 Dec 2025 05:53
URI: https://ir.psgcas.ac.in/id/eprint/2567

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