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Infestation and population dynamics of insects on stored cassava and yams chips in Benin, West Africa

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Title Infestation and population dynamics of insects on stored cassava and yams chips in Benin, West Africa
 
Creator Gnonlonfin, G.J.B.
Hell, K.
Siame, A.B.
Fandohan, P.
 
Subject cassava
ecology
 
Description 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.
 
Date 2008-12-01
2015-09-30T10:55:52Z
2015-09-30T10:55:52Z
 
Type Journal Article
 
Identifier Gnonlonfin, G.J.B., Hell, K., Siame, A.B. and Fandohan, P. 2009. Infestation and population dynamics of insects on stored cassava and yams chips in Benin, West Africa. Journal of Economic Entomology 101(6):1967-1973.
1938-291X
https://hdl.handle.net/10568/68352
https://doi.org/10.1603/0022-0493-101.6.1967
 
Language en
 
Rights Limited Access
 
Publisher Oxford University Press
 
Source Journal of Economic Entomology