Aflatoxin contamination caused by natural fungal infection of preharvest corn

Autor: Neil W. Widstrom, E. S. Horner, A. Manwiller, M. S. Zuber, D. B. Sauer, M. Turner, W. D. Guthrie, W. R. Findley, W. F. Kwolek, L. M. Josephson, E. B. Lillehoj
Rok vydání: 1980
Předmět:
Zdroj: Plant and Soil. 54:469-475
ISSN: 1573-5036
0032-079X
DOI: 10.1007/bf02181839
Popis: Aflatoxin contamination of developing corn (Zea mays L.) kernels caused by natural infection byAspergillus flavus Link ex Fries was studied in hybrids developed for the U.S. corn belt and for the southern U.S. and grown at diverse locations in 1977. Planting dates were staggered to examine the effect of crop maturity on infection by the toxin-producing fungus. A broad range of toxin values was observed at harvest; some levels exceeded the highest that had been previously recorded in corn. The highest concentration of aflatoxin B1 detected was 8030 ppb. Levels of toxin differed significantly among planting dates in Florida and Georgia; the second planting date at these locations contained the highest toxin levels. Elevated concentrations of toxin were characteristic of kernel samples from southern locations and southeast Missouri; at these locations samples from hybrids developed for the south had significantly lower levels of toxin than hybrids developed for the corn belt. Ears with heavy insect damage had higher toxin levels than ears with less evidence of insect attack.
Databáze: OpenAIRE
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