Infestation and population dynamics of insects on stored cassava and yams chips in Benin, West Africa
| Autor: | G.J.B. Gnonlonfin, P Fandohan, A. B. Siame, K. Hell |
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| Rok vydání: | 2009 |
| Předmět: |
Insecta
Manihot Population Population Dynamics Food Contamination Cathartus medicine.disease_cause Insect Control Infestation Botany medicine Animals Benin education education.field_of_study Ecology biology Dioscorea Silvanidae General Medicine biology.organism_classification Prostephanus truncatus Horticulture Insect Science Curculionidae Bostrichidae Seasons |
| Zdroj: | Journal of economic entomology. 101(6) |
| ISSN: | 0022-0493 |
| Popis: | Natural insect infestation in cassava (Manihot esculenta Crantz subspecies esculenta) and yam (Dioscorea spp.) chips was evaluated during two consecutive storage seasons (2003-2004 and 2004-2005) in two agroecological zones of Benin (Northern Guinea Savanna [NGS] and Sudan Savanna [SS]). The insects infesting chips were collected, identified, and counted, they included Prostephanus truncatus (Horn) (Coleoptera: Bostrychidae), Cathartus quadricollis (Guerin) (Coleoptera: Silvanidae), Carpophilus dimidiatus (F.) (Coleoptera: Nitidulidae), Tribolium castaneum (Herbst) (Coleoptera: Tenebrionidae), and Sitophilus zeamais Motschulsky (Coleoptera: Curculionidae). P. truncatus and C. quadricollis were observed with a higher prevalence on cassava than on yam chips. During both seasons after 3 mo of storage, all (100%) cassava chip samples were infested with P. truncatus and C. quadricollis in both agroecological zones, whereas yam chips only showed lower infestation rates of 59.5 and 19.1% for P. truncatus and C. quadricollis, respectively, at the end of storage in 2003-2004. During the 2004-2005 season after 3 mo of storage infestation rate in yam chips was 66 and 24% in NGS and 100 and 0% in SS for P. truncatus and C. quadricollis, respectively, showing that insect infestation levels vary significantly with commodity, year, and fluctuate during the storage season. |
| Databáze: | OpenAIRE |
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