Notes on adult emergence of West Indian sweet potato weevil, Euscepes postfasciatus (FAIRMAIRE) (Coleoptera: Curculionidae) and emerged adult's physiological state

<Author> Masaaki IWATA ; Satoshi SHIMABUKURO ; Satoru MAKIGUCHI ; Akihiro ISHIKAWA ; Keiji YASUDA
<Year> 1994
<Journal> Res. Bull. Pl. Plot. Japan
<Volume> 30
<Issue>
<Pages> 83-86
<Notes> Japanese

Adult emergence of West Indian sweet potato weevil, Euscepes postfasciatus (FAIRMAIRE), was observed in the laboratory at 27+-1 deg C under 14L-10D photoperiod. The dissection of emerged adults gave the ovarian development and the amount of fat body. The periods from eggs to adults emerged from pupae were not different between females and males. Female adults, howerver, remained in sweet potato tubers slightly longer than males. The abdomens of adults emerged from pupae were filled with fat body in both sexes and ovaries did not develop. Some consumption of fat was observed at the emergence from sweet potato tubers and ovaries developed. Females tended to consume more fat than males during ovarian development.