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 storage, while three isolates continued in vitro azygospore production, three isolates no longer produced azygospores in vitro.
Journal of Invertebrate Pathology
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Hajek, Ann E., and Plymale, Ruth C. "Variability in Azygospore Production among Entomophaga maimaiga Isolates," Journal of Invertebrate Pathology, Elsevier, 104 (2010) Mar 15, 157-159. doi: 10.1016/j.jip.2010.03.003