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TESTING OF THE INSECT PEST CONTROL FUNGUS BEAUVERIA BASSIANA IN GRASS SHRIMP PALAEMONETES PUGIO
Citation:
Genthner, F., S. Foss, AND W. Fisher. TESTING OF THE INSECT PEST CONTROL FUNGUS BEAUVERIA BASSIANA IN GRASS SHRIMP PALAEMONETES PUGIO. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/J-95/015.
Description:
Embryos, larvae and adult grass shrimp Palaemonetes pugio were exposed to spores of the insect-control fungus Beauveria bassiana. onidiospores attached to embryos held by gravid females and remained with the egg mass for at least 6 d. In the first experiment where individual developing embryos contained in test tubes were exposed to conidiospores of B. bassiana, 2 of the 75 embryos became infected and died, and a third was abnormal at hatch. n Expt 2, a repeat experiment, no adverse effects were observed. n subsequent experiments, attempts were made to increase the probability of infection or abnormal development for embryos exposed to B. bassiana. trategies for these attempts included lowering the salinity, adding a carbon source for the fungus to the test water, or rendering embryos free of potentially protective symbiotic bacteria with an antibacterial agent. ll attempts were unsuccessful in promoting infection,,gr abnormal development. . bassiana did not cause any adverse effects during shrimp larval development. n adult shrimp lethal infections only occurred in specimens injected with either conidiospores or blastospores B. bassiana.