INVESTIGATIONS ON THE GENERABEAUVERIAVUILL, ANDTRITIRACHIUMLIMBER

摘要

A thorough review of the literature shows that 32 alleged species have been involved in the generaBeauveriaandTritirachium. Fourteen of these are reduced to synonymy withB.bassianaandB.tenella; ten belong to the form genusTritirachium; one, "Tritirachium epigaeum", is regarded as uncertain as to genus; and seven are excluded from both.Beauveria stephanoderis,B.laxa,B.globulifera,B.effusa,B.vexans,B.doryphorae,B.delacroixii, andB.acridiorumare strains ofB.bassiana; whileB.densa,B.melolonthae,B.brongniartii, andB.shiotaeare strains ofB.tenella. The speciesT.dependens,T.album,T.spicatum,T.oryzae,T.heimii,T.brumpti,T.musae,T.purpureum,T.cinnamomeum, andT.roseumare characteristic of the form genusTritirachium.Beauveria peteloti,B.rileyi,B.paranense,B.coccorum,B.coccospora,T.rubrum, andT.viannaiare characteristic of neither genus. The above conclusions are based on a study of the cultural and morphological characteristics of numerousBeauveriaisolates from 70 insect and four rodent species. Most characteristics adopted by earlier investigators to differentiate betweenBeauveriaspecies are not valid as criteria upon which to establish species. Moreover, these characteristics are unstable and can be changed simply through monospore culturing or by transferring cultures from one type of medium to another. From a review of the literature, it is evident that: members of the genusBeauveriaare primarily parasitic on insects, whereas members of the genusTritirachiumare primarily saprophytes.