Characterization and Distribution of Fusarium nygamai, sp. nov.

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Abstract
Fusarium nygamai is described and illustrated. The key features of this species are the formation of microconidia in relatively short chains as well as false heads and the production of rough-walled chlamydospores singly, in chains and in clusters. Descriptions of the sporodochial cultures, macroconidia, microconidia and chlamydospores are given and the new species is compared to F. oxysporum, F. moniliforme, F. fujikuroi and F. proliferatum. Fusarium nygamai was isolated initially from roots of grain sorghum from New South Wales, Australia. Subsequently it has been isolated from heads of grain sorghum and bean roots and from soil from grasslands in subtropical, warm temperature and semiarid areas of eastern Australia. Isolates have also been recovered from soil samples from the Republic of South Africa, the Republic of Transkei, Thailand and Puerto Rico.

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