Abstract
Twenty-two Fusarium species as well as three undescribed populations were recovered from 42 sites representing three different climatic regions: Darwin (tropical), Alice Springs (arid) and Ceduna (mediterranean). These species were F. acuminatum subsp. acuminatum, F. anthophilum, F. avenaceum subsp. aywerte, F. beomiforme, F. chlamydosporum, F. compactum, F. dimerum, F. equiseti, F. graminearum Group 1, F. lateritium, F. longipes, F. merismoides, F. moniliforme, F. napiforme, F. nygamai, F. oxysporum, F. polyphialidicum, F. proliferatum, F. semitectum, F. scirpi, F. solani, F. subglutinans . Fifteen species were recovered from soils from the tropical region, 13 species and three undescribed populations from the arid region and seven species from the mediterranean region. Species found in all three regions were F. dimerum, F. equiseti, F. solani and F. oxysporum . Species recovered only from tropical soils were F. beomiforme, F. longipes, F. moniliforme and F. subglutinans. F. nygamai and F. scirpi were only recovered from arid soils; and F. a. acuminatum was only recovered from the mediterranean region. F. chlamydosporum and F. compactum were isolated frequently from soils in the tropical and arid regions but were more abundant in the arid soils from Alice Springs.
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