Metarhizium acridum (entomopathogen)

Metarhizium • Hypocreales • Sordariomycetes • Ascomycota • entomopath. fungi • Diseases of pests • Beneficials

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red locusts killed by Metarhizium acridum (click on image to enlarge it)
Author(s): Christiaan Kooyman
Source: Wikimedia Commons

Metarhizium acridum - culture, phialides and conidia - scale bars = 10 μm (click on image to enlarge it)
Author(s): S. Mongkolsamrit et al.
Source: Studies in Mycology (2020), vol. 95, p. 195

Metarhizium acridum (entomopathogen) (Driver & Milner) J.F. Bisch., Rehner & Humber 2009

This fungus is widely distributed and has been reported mainly from tropical and subtropical regions. The predominant hosts belong to the order Orthoptera like locusts and grasshoppers, but infections have been also reported in other insect groups.

M. acridum is closely related to Metarhizium anisopliae and until 2009 was considered to be part or a variety of that species. In some publications this species has also been misidentified as Metarhizium flavoviride. M. acridum has egg-shaped condia, in contrast to the cylindrical conidia common of most other Metarhizium species.

For details see the respective page in Wikipedia.

Synonyms:
Metarhizium anisopliae var. acridum