FUMONISIN B sub(1) AND AFLATOXIN B sub(1) LEVELS IN KENYAN MAIZE

Maize ear rot is an important disease of maize in Kenya. In this study fumonisin B sub(1) (FB sub(1)) and aflatoxin B sub(1) (AFB sub(1)) analysis were conducted on symptomless and rotten maize harvested at different harvest time points after physiological maturity (HTPAPM). Fusarium verti-cillioide...

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Bibliographic Details
Published in:Journal of plant pathology 2009-07, Vol.91 (2), p.459-464
Main Authors: Alakonya, A E, Monda, E O, Ajanga, S
Format: Article
Language:English
Subjects:
Aspergillus flavus
Aspergillus parasiticus
Fusarium
Zea mays
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Summary:Maize ear rot is an important disease of maize in Kenya. In this study fumonisin B sub(1) (FB sub(1)) and aflatoxin B sub(1) (AFB sub(1)) analysis were conducted on symptomless and rotten maize harvested at different harvest time points after physiological maturity (HTPAPM). Fusarium verti-cillioides dominated at all HTPAPM. Other fungi reported include Aspergillus flavus, Aspergillus parasiticus and Sternocarpella maydis. In 2001, FB sub(1) levels in symptomless maize ranged between 22 to 1348 ug/kg. Mean FB sub(1) levels at 4, 8, and 12 weeks HTPAPM for Malava were 56, 80 and 317 kg/kg respectively. In Tongaren during 2001 mean FB sub(1) levels of 41, 179 and 590 kg/kg were recorded at 4, 8, 12 week HTPAPM respectively. The FB sub(1) levels in rotten maize ranged from 39 to >5000 kg/kg and increased with HTPAPM. The highest AFB sub(1) level was 17 kg/kg in rotten maize. The results suggest that delayed harvesting could increase FB sub(1) contamination in maize.
ISSN:1125-4653