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Full-Text Articles in Organisms
Emergent Fungal Entomopathogen Does Not Alter Density Dependence In A Viral Competitor, Andrew M. Liebhold, Ruth Plymale, Joseph S. Elkinton, Ann E. Hajek
Emergent Fungal Entomopathogen Does Not Alter Density Dependence In A Viral Competitor, Andrew M. Liebhold, Ruth Plymale, Joseph S. Elkinton, Ann E. Hajek
Articles
Population cycles in forest Lepidoptera often result from recurring density-dependent epizootics of entomopathogens. While these systems are typically dominated by a single pathogen species, insects are often infected by multiple pathogens, yet little is known how pathogens interact to affect host dynamics. The apparent invasion of northeastern North America by the fungal entomopathogen Entomophaga maimaiga some time prior to 1989 provides a unique opportunity to evaluate such interactions. Prior to the arrival of E. maimaga, the oscillatory dynamics of host gypsy moth, Lymantria dispar, populations were apparently driven by epizootics of a nucleopolyhedrovirus. Subsequent to its emergence, E. …
Variability In Azygospore Production Among Entomophaga Maimaiga Isolates, Ann E. Hajek, Ruth C. Plymale
Variability In Azygospore Production Among Entomophaga Maimaiga Isolates, Ann E. Hajek, Ruth C. Plymale
Articles
This study describes in vitro and in vivo azygospore production by nine isolates of Entomophaga maimaiga, a fungal pathogen of the gypsy moth, Lymantria dispar. The three E. maimaiga isolates that consistently produced azygospores in vitro were also strong producers of azygospores in vivo. However, two additional isolates that were strong azygospore producers in vivo did not produce azygospores in vitro. Isolates that produced azygospores in vitro produced both conidia and azygospores more frequently in vivo than isolates not producing azygospores in vitro. In vitro azygospore production varied over time as well as by isolate. After >2 years of cold …