Survival ofFusarium moniliformeHyphae and Conidia in Grain Sorghum Stalks

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Abstract
F. moniliforme conidia and vegetative hyphae from colonized sterile grain sorghum (S. bicolor) stalk sections stored in canning jars above and below the ground in Kansas [USA] overwintered (1979 and 1980) without loss of viability or pathogenicity. No specialized structures such as thick hyphae, chlamydospores or sclerotia were observed in 1979 although chlamydospore-like cells were observed on some hyphae in 1980. No loss in viability of F. moniliforme conidia or hyphae was detected when stored at -16.degree. C for 6 mo. This indicates that low winter temperatures per se have no lethal effects of F. moniliforme and that specialized structures may not be essential for overwintering of F. moniliforme.

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