Final diagnosis


Sweet potato weevils

Weevil ( <b><i>C. formicarius</i></b> ) damage in a sweet potato tuber, we clearly observe the difference between the weevil emergence holes and the corresponding smaller diameter holes to "nutritional bites".
Weevil damage to a sweet potato tuber
Dégâts de charançons dans un tubercule de patate douce, on observe bien la galerie de l'insecte ainsi que la partie du tubercule nécrossée sur la surface extérieure
Weevil larvae in a sweet potato
Cylas-Grandgirard2
Galleries caused by <i><b>Cylas formicarius</i></b> in a sweet potato tuber.
This completely rotten tuber harbors numerous sweet potato weevil larvae.
Larva of <b><i>Cylas formicarius</i></b> in its gallery on a sweet potato stem
Nymph of <i><b>Cylas formicarius</b></i>.
Many adult weevils on this bitten sweet potato
<b><i>Cylas formicarius</i></b> adult on sweet potato
Adult of <i><b>Cylas formicarius</b></i>, Size = 6-7 mm long
McCormack, Gerald (2007) Cook Islands Biodiversity
<b><i>Euscepes postfasciatus</i></b> adult on sweet potato
Detail of an adult <b><i>Euscepes postfasciatus</i></b> on sweet potato
<b><i>Euscepes postfasciatus</i></b> adult feeding on sweet potato