In vitro control of fusarium diseases of Asparagus officinalis L. with a Streptomyces of its polyene antibiotic, faeriefungin

Smith, J.; Putnam, A.; Nair, M.

In vitro control of fusarium diseases of Asparagus officinalis L. with a Streptomyces of its polyene antibiotic, faeriefungin

1990

Smith, J. | Putnam, A. | Nair, M.

Faeriefungin, a novel antibiotic from Streptomyces griseus var. autotrophicus (ATCC 53668), effectively controlled root rot and stem wilt of Asparagus officinalis L. caused by Fusarium oxysporum (Schlecht.) emend. synd. & Hans. f. sp asparagi (FOA) Cohen and Heald in the laboratory. Faeriefungin did not adversely affect UC157 asparagus seed germination or plant growth. This antibiotic at 25 ppm decreased the severity of disease in sterile asparagus plants grown on water agar and increased fibrous root weight of plants grown in the absence of F. oxysporum. The producer organism, grown on several media, was found to be antagonistic to F. oxysporum. Root dip treatments of UC157 seedlings in S. griseus cell suspension resulted in a greater fleshly root dry weight, total root dry weight, and total plant dry weight for plants challenged with FOA compared to controls.

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