Adaptation to artificial rearing during successive generations in the West Indian sweetpotato weevil, Euscepes postfasciatus (Coleoptera: Curculionidae)

Yukio Shimoji, Takahisa Miyatake

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

An eradication project has been initiated in the southwestern island of Japan to contain the West Indian sweetpotato weevil, Euscepes postfasciatus (Fairmaire) using the sterile insect technique (SIT). We report here about rearing this insect for >14 successive generations on an artificial diet, an element required for successful use of SIT. The fecundity of reared weevils increased with each generation. Egg hatch (85-95%) and adult yield (30-60%) were consistenetly high throughout the test period. Comparisons of fecundity and preoviposition periods indicated that females from the artificially reared strain at generation 14 oviposited more and earlier in life than those from the base stock. These differences resulted from an increase in frequency (100%) of females that laid eggs without standard oviposition substrates in the artificially reared strain. Adaptation to an artificial diet is discussed in relation to the oviposition behavior of E. postfasciatus and the success of SIT against this weevil.

Original languageEnglish
Pages (from-to)735-739
Number of pages5
JournalAnnals of the Entomological Society of America
Volume95
Issue number6
Publication statusPublished - Nov 2002
Externally publishedYes

Fingerprint

Euscepes postfasciatus
artificial rearing
sterile insect technique
Curculionidae
artificial diets
Coleoptera
fecundity
oviposition
insect rearing
Japan
testing

Keywords

  • Adaptation
  • Artificial rearing
  • Euscepes postfasciatus
  • Oviposition behavior
  • Sterile insect technique

ASJC Scopus subject areas

  • Insect Science

Cite this

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abstract = "An eradication project has been initiated in the southwestern island of Japan to contain the West Indian sweetpotato weevil, Euscepes postfasciatus (Fairmaire) using the sterile insect technique (SIT). We report here about rearing this insect for >14 successive generations on an artificial diet, an element required for successful use of SIT. The fecundity of reared weevils increased with each generation. Egg hatch (85-95{\%}) and adult yield (30-60{\%}) were consistenetly high throughout the test period. Comparisons of fecundity and preoviposition periods indicated that females from the artificially reared strain at generation 14 oviposited more and earlier in life than those from the base stock. These differences resulted from an increase in frequency (100{\%}) of females that laid eggs without standard oviposition substrates in the artificially reared strain. Adaptation to an artificial diet is discussed in relation to the oviposition behavior of E. postfasciatus and the success of SIT against this weevil.",
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AB - An eradication project has been initiated in the southwestern island of Japan to contain the West Indian sweetpotato weevil, Euscepes postfasciatus (Fairmaire) using the sterile insect technique (SIT). We report here about rearing this insect for >14 successive generations on an artificial diet, an element required for successful use of SIT. The fecundity of reared weevils increased with each generation. Egg hatch (85-95%) and adult yield (30-60%) were consistenetly high throughout the test period. Comparisons of fecundity and preoviposition periods indicated that females from the artificially reared strain at generation 14 oviposited more and earlier in life than those from the base stock. These differences resulted from an increase in frequency (100%) of females that laid eggs without standard oviposition substrates in the artificially reared strain. Adaptation to an artificial diet is discussed in relation to the oviposition behavior of E. postfasciatus and the success of SIT against this weevil.

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