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EFFECT OF BEAUVERIA BASSIANA AND ITS TOXINS ON MYSIDOPSIS BAHIA (MYSIDACEA)
Citation:
Genthner, F., G. Cripe, AND D. Crosby. EFFECT OF BEAUVERIA BASSIANA AND ITS TOXINS ON MYSIDOPSIS BAHIA (MYSIDACEA). U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-94/113 (NTIS PB94155520).
Description:
Beauveria bassiana spores and metabolites were evaluated for toxicity and pathogenicity to Mysidopsis bahia. tatic acute 96-hr tests were conducted with <24-h-old M. bahia using either conidiospores, the mycotoxin, beauvericin, or a nonpolar extract of the mycelia. onidiospore densities of > 1.5 X 10 6/ml caused high mortalities. hese mortalities ere attributed to a high particulate density since heat-killed controls also proved lethal. eauvericin, a cyclic depsipeptide produced by some strains of B. bassiana, was toxic at an LC50 of 0.56 mg/l. he toxicity of beauvericin persisted in sterile seawater for at least 3, but not 8 weeks. onpolar extract of mycelia from B. bassiana containing beauvericin was toxic at an LC50 of 84.2 mg/l. In contrast, a nonpolar extract of mycelia from the fungal weed pathogen, Colletotrichum gloeosporioides f. sp. aeschynomene, was not toxic when tested up to 70.4 mg/l.