You are here:
LACK OF ANTAGONISM BETWEEN THE BIOCONTROL AGENT GLIOCLADIUM VIRENS AND VESICULAR ARBUSCULAR MYCORRHIZAL FUNGI
Citation:
Paulitz, T. AND R. Linderman. LACK OF ANTAGONISM BETWEEN THE BIOCONTROL AGENT GLIOCLADIUM VIRENS AND VESICULAR ARBUSCULAR MYCORRHIZAL FUNGI. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-93/035.
Description:
Fungal biocontrol agent Gliocladium virens Miller, Giddens & Foster on the colonization of cucumber by the VA mycorrhizal fungi Glomus etunicatum Becker & Gerdemann and Glomus mosseae (Nicol. & Gerd.) Gerdemann & Trappe was investigated. noculum of G. virens grown on wheat bran or peatmoss-Czapek substrate, was added to soil artificially infested with Pythium ultimum Trow. amping-off of cucumber and pathogen population density were reduced in treatments with G. Virens. noculum of G.virens was also added to soils containing increasing propagule densities of Glomus etunicatum or Glomus mosseae. fter one week of incubation, the soils were planted with cucumber seeds, and percent mycorrhizal colonization of roots was determined after 12d. hen grown on wheat bran, G. irens was phytotoxic and increased mycorrhizal colonization by Glomus etunicatum. owever, G.virens had no effect on Glomus etunicatum when added as peatmoss-Czapek inoculum. mendment of soil with peatmoss-Czapek inoculum of G. virens reduced colonization by Glomus mosseae when compared to a non-amended control Inoculum colonized by other fungal biocontrol agents and propylene-oxide gave a similar reduction, suggesting the substrate, not G. virens, was responsible for the reduction in VA mycorrhizal colonization.