Effect of a Water-Soluble Guar Root Extract on Spore Germination and Mycelial Growth of Various Fungi. Dennis A. Johnson, Assistant Professor, Texas A&M University Agricultural Research Station, Vernon 76384. Ronnie Reinisch, Research Technician, Texas A&M University Agricultural Research Station, Vernon 76384. Plant Dis. 64:932-934. Copyright 1980 American Phytopathological Society. DOI: 10.1094/PD-64-932.

A water extract from the bark of guar roots inhibited germination of conidia and growth of mycelia of several plant pathogenic fungi. Germination of conidia and growth of mycelia of other test fungi were either stimulated or not affected by the extract. Fewer sclerotia were produced by Phymatotrichum omnivorum in soil with the extract than in soil without the extract.

Keyword(s): antifungal substance, Cyamopsis tetragonoloba, inhibition.