Aspergillus flavus on groundnut (Arachis hypogaea L.) and its control in Nigeria

McDonald, D. (1969) Aspergillus flavus on groundnut (Arachis hypogaea L.) and its control in Nigeria. Journal of Stored Products Research, 5 (3). pp. 275-280.

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Groundnuts are produced in two distinct zones in Nigeria; the dry northern zone where 95 per cent of the crop is grown, and the wetter riverain zone. In the northern zone the crop is normally harvested after the rains have ended, but in the riverain zone harvesting takes place during the rains. Investigations on groundnuts from the 1961 crop showed that A. flavus infection of kernels and aflatoxin production occurred in both zones. The condition of the shell was found to have a marked influence on the fungal infection and toxicity of the kernels. Kernels from undamaged pods were only rarely infected by A. flavus, whereas kernels from perforated pods had a high degree of infection with this and other fungi. Kernels from termitescarified pods were intermediate in this respect. Kernels from all pod grades showed higher fungal infection in material from the riverain zone than in that from the northern zone, indicating that poor drying conditions could be of importance. Trials at Mokwa in the riverain zone and at Kano in the northern zone in which various methods of drying were tested demonstrated that rapid drying gave kernels with low fungal infection and little or no toxicity. Slow drying with kernel moisture contents staying above 20 per cent for extended periods resulted in heavily infected, toxic kernels. Kernels from undamaged, mature pods were found to be free from fungal infection at lifting, infection by A. flavus not normally occurring until some 4–6 days after harvest. Over-mature pods and pods from plants that had died before harvest had kernels infected by fungi at lifting in the northern zone. On the basis of these findings recommendations were made to farmers for control of A. flavus in the groundnut crop

Item Type: Article
Additional Information: SNNigam collections
Author Affiliation: Institute for Agricultural Research, Ahmadu Bello University, Zaria, Nigeria
Subjects: Plant Protection
Plant Protection > Control Methods
Divisions: Groundnut
Depositing User: Mr T L Gautham
Date Deposited: 08 Aug 2013 13:31
Last Modified: 08 Aug 2013 13:31
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