Mycopathologia (1999) 147, 37-41
M. Etcheverry, A. Nesci, G. Barros, A. Torres and S. Chulze (1999)
Occurrence of Aspergillus section flavi and aflatoxin B-1 in corn genotypes and corn meal in Argentina
Mycopathologia 147 (1), 37-41
Abstract: A study has been carried out in Argentina on samples of corn genotypes from a breeding station as well as in commercially available corn meal. All samples were analyzed for fungal infection and aflatoxin B1.Mycological analysis of corn genotypes showed the presence of three principal genera of filamentous fungi Fusarium (100%), Penicillium (67%) and Aspergillus (60%). In the genus Fusarium three species were identified, F. moniliforme (42%), F. nygamai (56%) andF. proliferatum (1.8%). Eight species ofPenicillium were identified, the predominant species isolated were P. minioluteum, P. funiculosum and P. variabile. In the genus ranked third in isolation frequency, two species were identified, A. flavus and A. parasiticus, the percentage of infection was 78% and 21%, respectively. Only one corn genotype was contaminated with aflatoxin B1 at a level of 5 ppb. The cornmeal samples showed great differences in fungal contamination, the values ranging from 1 × 101 to 7 × 105 cfu g-1. Fusarium (68%), Aspergillus (35%) and Penicillium (21%) were the most frequent genera isolated. Among the genus, Aspergillus, A. parasiticus (38%) was the most frequent species isolated. All the samples of corn meal were negative to aflatoxin B1. These results indicate a low degree of human exposure to aflatoxins in Argentina through the ingestion of maize or corn meal.
(The abstract is excluded from the Creative Commons licence and has been copied with permission by the publisher.)
Link to article at publishers website
Database assignments for author(s): Miriam G. Etcheverry
Research topic(s) for pests/diseases/weeds:
surveys/sampling/distribution
Pest and/or beneficial records:
| Beneficial | Pest/Disease/Weed | Crop/Product | Country | Quarant.
|
|---|---|---|---|---|
| Aspergillus flavus (plant/storage disease) | Stored grain | Argentina | ||
| Aspergillus parasiticus | Stored grain | Argentina | ||
| Fusarium verticillioides | Maize/corn (Zea mays) | Argentina | ||
| Talaromyces funiculosus | Stored grain | Argentina | ||
| Fusarium proliferatum | Maize/corn (Zea mays) | Argentina | ||
| Fusarium nygamai | Maize/corn (Zea mays) | Argentina |
