Distribution of Aspergillus Section Flavi among Field Soils from the Four Agroecological Zones of the Republic of Bénin, West Africa

Plant Disease
K F Cardwell, Peter J Cotty

Abstract

Certain members of Aspergillus section Flavi produce carcinogenic and immunotoxic metabo-lites called aflatoxins. These fungi perennate in soils and infect maize grain in the field and in storage. The distribution of Aspergillus section Flavi across the four different agroecologies of Bénin Republic was determined. The four agroecological zones range from humid equatorial tropics in the south to the dry savanna near the Sahara desert in the north. Soil samples collected in 1994 to 1996 from 44 different maize fields in Bénin were assayed over 3 years (88 samples total) for fungi in Aspergillus section Flavi. All soils tested contained A. flavus. Isolates (1,454 total) were collected by dilution plate from the soils and existed in populations ranging from <10 to >200 CFU/g of soil. CFU counts did not differ from year to year or change significantly with cropping systems within a zone, but differed significantly among zones. Incidence of A. flavus strain isolations varied from south to north, with greater number of CFU of L strain isolates in southern latitudes and higher numbers of CFU of S strain isolates found in the north. The L strain isolates occurred in 81 of 88 samples, whereas S strain isolates were in only 41 of 88 soil...Continue Reading

References

Jun 1, 1994·Mycopathologia·L O AdebajoO O Adesanya
Jan 1, 1994·Natural Toxins·M AdhikariP Berjak
May 1, 1999·Applied and Environmental Microbiology·P J Cotty, K F Cardwell
Mar 1, 1965·Applied Microbiology·R I MATELES, J C ADYE
Aug 1, 1991·Journal of Food Protection·Robert L BrownThomas E Cleveland
Nov 1, 1992·Journal of Food Protection·Joe W DornerPaul D Blankenship

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Citations

Feb 20, 2007·Applied and Environmental Microbiology·Claudia ProbstPeter J Cotty
Mar 3, 2020·Frontiers in Microbiology·Walter P PflieglerTünde Pusztahelyi
Sep 24, 2020·International Journal of Microbiology·Robert O OkayoBernard M Gichimu
Jun 1, 2006·Mycotoxin Research·P J Cotty, J E Mellon
Nov 1, 2017·Toxins·Amaranta Carvajal-CamposOlivier Puel
Nov 1, 2017·Frontiers in Public Health·Carina LadeiraOrish Ebere Orisakwe
Sep 23, 2018·International Journal of Food Microbiology·Pummi Singh, Peter J Cotty
Nov 5, 2020·Biological Control : Theory and Applications in Pest Management·Daniel AgbetiamehRanajit Bandyopadhyay
Mar 24, 2021·Plant Disease·Lourena A MaxwellPeter J Cotty
Jul 16, 2010·Food and Chemical Toxicology : an International Journal Published for the British Industrial Biological Research Association·Amar RibaNasserdine Sabaou

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