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INFECTIVITY AND TETRATOGENICITY OF BEAUVERIA BASSIANA IN MENDIA BERYLLINA EMBRYOS
Citation:
Middaugh, D. AND F. Genther. INFECTIVITY AND TETRATOGENICITY OF BEAUVERIA BASSIANA IN MENDIA BERYLLINA EMBRYOS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-94/274 (NTIS PB94191004).
Description:
Developing embryos of the inland silverside fish, Menidia eryllina, were exposed to conidiospores of the insect pathogenic fungus, Beauveria bassiana, that possessed activity against the migratory grasshopper, Melanoplus sanquinioes. arious adverse effects were observed in Menidia beryllina embryos and larvae. hey included rupture of the chorion, embryo death, developmental defects (vertebral abnormalities in the embryo or hatched larvae, and fungal infections on the mandibles of larvae. lthough there was little evidence of a definitive dose response trend based on densities of viable conidiospores, statistically significant (p < 0.01) responses were observed in tests in which conidiospore densities were as low as 7.1 x 103 and as high as 1.3 x 10 6/ml. iable spores were required for adverse effects to occur; heat-killed spores failed to cause significant adverse effects.