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Published online by Cambridge University Press: 19 September 2011
Xyleborus ferrugineus (F) was found damaging stored yam tubers, Dioscorea spp. in Nigeria. Infestation starts in November when the tuber moisture is about 62%. The mean developmental period in the tubers was 32 ± 3 days at 30 ± 2°C. Eggs were laid on the tuber surface damaged during harvesting and the first instar larva burrows inside the yam. Storage of undamaged tubers is suggested to prevent losses due to the pest.
L'insecte Xyleborus ferrugineus (F.) s'est revelé comme fléau destubercules d'igname (Dioscerea spp.) stockés au Nigéria. L'infestation commence en novembre alors que le taux d'humidité des tubercules s'élève à environ 62%. Les oeufs d'insecte sont déposés sur des tubercules abimes et les pre, ierès larves instars s'enfouient dans l'igname. Le cycle de development dure de 29 à 35 jours sous une température de 28 à 32°C. On peut minimiser des pertes par le simple stockage des tubercules non-abimés.