Application of spores ofNosema locustaeCanning on wheat bran to field plots in Cape Verde and Mauritania, resulted in infection of most species of Acrididae. The species infected includedOedaleus senegalensis(Krauss),Diabolocatantops axil‐laris(Thunberg),Pyrgomorpha cognataKrauss,Acrotylus longipes incarnatus(Krauss) andPseudosphingonotus savignyi(Sauss.). In the laboratory, inoculations of spores, administered by feeding, resulted in infections inAcorphya glaucopsis(Walker),Aiolopus simulatrix(Walker),Cataloipus cymbiferus(Krauss),Cryptocatantops haemorrhoidalisKrauss,Kraussaria angulifera(Krauss),Oedaleus nigeriensisUvarov,O. senegalensisandZonocerus variegatus (L.).Based on the taxonomic diversity of these species, it is likely that most, if not all, West African grasshoppers are susceptible to infection byN. locustae.