THE TAXONOMY AND HABITATS OF THE FUSARIUM SPECIES IN TRINIDAD, B.W.I.

摘要

A taxonomic study was made of isolates ofFusariumobtained by the writer from various habitats in Trinidad, B.W.I., during the early months of 1955. Initial phases of this study were carried out at the Imperial College of Tropical Agriculture, Trinidad, while the later phases were completed at the Plant Pathology Laboratory, Winnipeg, Man. Isolates ofFusariumwere obtained from a total of 41 different species and botanical varieties of host plants, from scale insects, and from soil. A total of 11 species and two varieties ofFusarium, classified in 10 sections of the genus, were identified among the various isolates. These sections, species, and varieties are: section Macroconia,F.coccophilum(Desm.) Wr. amp; Rg.; Spicarioides,F.decemcellulareBrick; Pseudomicrocera,F.coccidicolaP. Henn.; Arachnites,F.larvarumFuckel; Arthrosporiella,F.semitectumBerk. amp; Rav.; Gibbosum,F.equiseti(Cda.) Sacc.; Lateritium,F.lateritiumNees,F.stilboidesWr.; Liseola,F.moniliformeSheld.,F.moniliformevar.anthophilum(A. Br.) Wr.,F.moniliformevar.subglutinansWr. amp; Rg.; Elegans,F.oxysporumSchlecht. emend. Snyder amp; Hansen; Martiella,F.solani(Mart.) App. amp; Wr. emend. Snyder amp; Hansen. Six of these species are reported for the first time to occur in Trinidad, namely,F.coccophilum,F.decemcellulare,F.larvarum,F.equiseti,F.stilboides, andF.solani.Fusarium semitectumandF.moniliformewere most frequently encountered.The ascomycetous or perfect state ofF. coccophilum,Nectria ecoccophilaWr.; ofF.decemcellulare,Calonectria rigidiuscula(Berk. amp; Brme.) Sacc.; ofF.moniliforme,Gibberella fujikuroi(Saw.) Wr.; and ofF.solani,Hypomyces solani(Rke. amp; Berth.) emend. Snyder amp; Hansen were collected in nature.This paper is illustrated with drawings of the majority of theFusariumspecies and the ascomycetous states mentioned.