What benefits of Gliocladium virens have been cited in the scientific literature?
Gliocladium virens — also studied and registered under the synonym Trichoderma virens and marketed commercially as SoilGard — is a soilborne biocontrol fungus with a documented peer-reviewed record for disease suppression. Literature reports it is mycoparasitic on a broad range of fungi, producing extracellular enzymes including beta-glucanase, N-acetylglucosaminidase, lipase, and proteinase that contribute to its antagonistic activity against host pathogens such as Rhizoctonia solani and Pythium ultimum.
Field and greenhouse studies cited in the literature report 30–65% reductions in Fusarium wilt of tomato, with the commercial SoilGard formulation specifically reported to reduce disease by 62–68% when incorporated into potting medium. Damping-off suppression in eggplant, cucumber, and pepper seedlings — with stand counts comparable to non-infested controls — is also reported in the peer-reviewed record for Biodac-formulated G. virens applied to soilless mix.
As a plant-growth-promoting fungus (PGPF), Gliocladium virens is reported in the literature to improve shoot and root growth, seed germination, chlorophyll production, and overall yield, and to produce phytohormones, induce systemic resistance to pathogens and abiotic stress, and contribute to mineralization of major and minor nutrients in the rhizosphere.
1Potential claims from the literature
Reported to suppress damping-off of eggplant, cucumber, and pepper seedlings caused by Rhizoctonia solani when applied as an activated Biodac formulation to soilless mix, with stands comparable to non-infested controls and reduction of saprophytic growth of the pathogen
Reported to significantly reduce Fusarium wilt of tomato (30–65% reduction of disease incidence) in field trials, and commercially available G. virens product (SoilGard) reported to reduce disease by 62–68% when incorporated into potting medium
Reported to be mycoparasitic on a large number of fungi, producing extracellular enzymes including beta-glucanase, N-acetylglucosaminidase, lipase, and proteinase that may contribute to its antagonistic activity against host fungi such as Rhizoctonia solani
Reported to suppress soilborne plant diseases caused by Pythium ultimum and Rhizoctonia solani as a biocontrol agent (synonym Trichoderma virens), with biocontrol activity not reduced by disruption of the Psy1 peptide synthetase gene under tested conditions
Reported to be tolerant to the fungicides iprodione, dicloran, and vinclozolin up to 1,000 ppm a.i. in vitro, a property relevant to its use as a biocontrol agent in integrated pest management systems
Reported to promote crop growth by improving shoot and root growth, seed germination, chlorophyll production, and overall crop yield as a plant-growth-promoting fungus (PGPF) in the rhizosphere
Reported to produce phytohormones and defense-related enzymes, and to induce resistance in plants to help them withstand pathogen invasion and abiotic stresses as a PGPF
Reported to contribute to mineralization of major and minor elements required to support plant growth and productivity as a PGPF
Reported to harbor an expanded repertoire of mycoparasitism-specific genes (as Trichoderma virens, formerly Gliocladium virens), supporting its lifestyle as a mycoparasite and its use as a biocontrol agent for plant protection
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