The fungus was determined to belong to the genus Entomophaga in the fungal order Entomophthorales and was given the name maimaiga based on geographical distribution.
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Entomophaga maimaiga is a Japanese fungus which has shown striking success in managing Gypsy Moth populations in North America.
The fungus Entomophaga maimaiga was introduced to North America to control the gypsy moth Lymantria dispar. The fungus also infects O. leucostigma (Hajek et al., 2004) and could possibly have an impact in years when E. maimaiga is abundant.