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Influence of insect infestation on aflatoxin contamination of stored maize in four agroecological regions in Benin

Insect species and damage levels were evaluated and related to aflatoxin content in maize sampled from farmers' stores in four agroecological zones over a two-year period in Benin, West-Africa. In 1993, no aflatoxin was detected in maize that was free of isect damage. In the same year; in maize with...

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Main Authors: Hell, K., Cardwell, K., Sétamou, M., Schulthess, F.
Format: Journal Article
Language:Inglés
Published: 2000
Subjects:
maize
aflatoxins
farmers
storage
Online Access:https://hdl.handle.net/10568/99885
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author Hell, K.
Cardwell, K.
Sétamou, M.
Schulthess, F.
author_browse Cardwell, K.
Hell, K.
Schulthess, F.
Sétamou, M.
author_facet Hell, K.
Cardwell, K.
Sétamou, M.
Schulthess, F.
author_sort Hell, K.
collection Repository of Agricultural Research Outputs (CGSpace)
description Insect species and damage levels were evaluated and related to aflatoxin content in maize sampled from farmers' stores in four agroecological zones over a two-year period in Benin, West-Africa. In 1993, no aflatoxin was detected in maize that was free of isect damage. In the same year; in maize with more than 70 % of cobs damaged by insects 30.3 % were aflatoxinpositive, with a mean aflatoxin contamination of 77.8 ppb (parts per billion or kg). Grain moisture increased with damage levels. The mean aflatoxin content of maize infested with Carpophilus dimidiatus Fabricius (Coleoptera: Nitidulidae) was significantly higher than maize free of this pest (F = 5.05, P ~ 0.05). In 1994/95, the density of Mussidia nigrivinella Ragonot (Lepidoptera: Pyralidae), was significantly higher in the Northern Guinea Savanna than in the other zones, and the presence of this pest was positively correlated with the cob area visibly infected with Aspergillus jlavus Link (Deutoremycetes: Monoliales) (r = 0.239, P ~ 0.05) early in storage. Six months later, damage levels due to insects were significantly lower in the Sudan Savanna than in the other ecozones. The infestation level of the most common storage pest, Sitophilus zeamais Motschuisky (Coleoptera: Curcilionidae) decreased from the south to the north. After six months of storage aflatoxin level was positively correlated with the cob area damaged by Sesamia calamistis Hampson (Lepidoptera: Noctuidae) (r = 0.25, P ~ 0.05), the number of Cryptophlebia leucotreta (Meyrick) (Lepidoptera: Tortricidae) observed on maize (r =.26, P ~ 0.05) and cob area damaged by S. zeamais (r = 0.22, P ~ 0.05).
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spelling CGSpace998852023-02-15T06:45:19Z Influence of insect infestation on aflatoxin contamination of stored maize in four agroecological regions in Benin Hell, K. Cardwell, K. Sétamou, M. Schulthess, F. maize aflatoxins farmers storage Insect species and damage levels were evaluated and related to aflatoxin content in maize sampled from farmers' stores in four agroecological zones over a two-year period in Benin, West-Africa. In 1993, no aflatoxin was detected in maize that was free of isect damage. In the same year; in maize with more than 70 % of cobs damaged by insects 30.3 % were aflatoxinpositive, with a mean aflatoxin contamination of 77.8 ppb (parts per billion or kg). Grain moisture increased with damage levels. The mean aflatoxin content of maize infested with Carpophilus dimidiatus Fabricius (Coleoptera: Nitidulidae) was significantly higher than maize free of this pest (F = 5.05, P ~ 0.05). In 1994/95, the density of Mussidia nigrivinella Ragonot (Lepidoptera: Pyralidae), was significantly higher in the Northern Guinea Savanna than in the other zones, and the presence of this pest was positively correlated with the cob area visibly infected with Aspergillus jlavus Link (Deutoremycetes: Monoliales) (r = 0.239, P ~ 0.05) early in storage. Six months later, damage levels due to insects were significantly lower in the Sudan Savanna than in the other ecozones. The infestation level of the most common storage pest, Sitophilus zeamais Motschuisky (Coleoptera: Curcilionidae) decreased from the south to the north. After six months of storage aflatoxin level was positively correlated with the cob area damaged by Sesamia calamistis Hampson (Lepidoptera: Noctuidae) (r = 0.25, P ~ 0.05), the number of Cryptophlebia leucotreta (Meyrick) (Lepidoptera: Tortricidae) observed on maize (r =.26, P ~ 0.05) and cob area damaged by S. zeamais (r = 0.22, P ~ 0.05). 2000 2019-03-03T05:53:50Z 2019-03-03T05:53:50Z Journal Article https://hdl.handle.net/10568/99885 en Limited Access Hell, K., Cardwell, K., Sétamou, M. & Schulthess, F. (2000). Influence of insect infestation on aflatoxin contamination of stored maize in four agroecological regions in Benin. African Entomology, 8, 169-177.
spellingShingle maize
aflatoxins
farmers
storage
Hell, K.
Cardwell, K.
Sétamou, M.
Schulthess, F.
Influence of insect infestation on aflatoxin contamination of stored maize in four agroecological regions in Benin
title Influence of insect infestation on aflatoxin contamination of stored maize in four agroecological regions in Benin
title_full Influence of insect infestation on aflatoxin contamination of stored maize in four agroecological regions in Benin
title_fullStr Influence of insect infestation on aflatoxin contamination of stored maize in four agroecological regions in Benin
title_full_unstemmed Influence of insect infestation on aflatoxin contamination of stored maize in four agroecological regions in Benin
title_short Influence of insect infestation on aflatoxin contamination of stored maize in four agroecological regions in Benin
title_sort influence of insect infestation on aflatoxin contamination of stored maize in four agroecological regions in benin
topic maize
aflatoxins
farmers
storage
url https://hdl.handle.net/10568/99885
work_keys_str_mv AT hellk influenceofinsectinfestationonaflatoxincontaminationofstoredmaizeinfouragroecologicalregionsinbenin
AT cardwellk influenceofinsectinfestationonaflatoxincontaminationofstoredmaizeinfouragroecologicalregionsinbenin
AT setamoum influenceofinsectinfestationonaflatoxincontaminationofstoredmaizeinfouragroecologicalregionsinbenin
AT schulthessf influenceofinsectinfestationonaflatoxincontaminationofstoredmaizeinfouragroecologicalregionsinbenin

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