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Antagonistic Activity of Neocosmospora vasinfecta var. africana (von Arx) Cannon & Hawksworth against Soil‐borne Fungi
Author(s) -
Turhan Gülay,
Grossmann F.
Publication year - 1988
Publication title -
journal of phytopathology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.53
H-Index - 60
eISSN - 1439-0434
pISSN - 0931-1785
DOI - 10.1111/j.1439-0434.1988.tb04468.x
Subject(s) - biology , sclerotinia sclerotiorum , antibiosis , rhizoctonia solani , mycelium , phytophthora capsici , macrophomina phaseolina , botany , verticillium dahliae , horticulture , alternaria alternata , fungus , phoma , rhizoctonia , phytophthora , bacteria , genetics
An isolate of Neocosmospora vasinfecta var. africana (F‐2) was assayed for its antagonistic activity against 15 soil‐borne fungi; 14 of them were important plant pathogens. The fungus exhibited a strong antibiotic effect against most of the fungi under test. While Pythium debaryanum, Macrophomina phaseolina, Phytophthora capsici, Sclerotinia sclerotiorum, Cochliobolus sativus and Alternaria alternata showed a very high degree of sensitivity as evidenced by the respectivezones of inhibition caused by the antagonist, Phoma betae, Rhizoctonia solani and Verticillium dahliae proved to be the most resistant. A mutual antibiosis existed between N. vasinfecta var. africana and five of the test fungi. The culture filtrate of the antagonist, diluted ten times with PDA, suppressed the mycelial growth of P. debaryanum and P. capsici completely. Whereas in this test R. solani proved to be the least sensitive, the remaining test fungi showed some differences in their susceptibility, but in any case their growth was inhibited significantly as compared to the controls.