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Bi‐ and trivoltine complex life cycles in a Kanto (Japan) population of a wild bruchid Kytorhinus sharpianus
Author(s) -
Ishihara Michihiro,
Shimada Masakazu
Publication year - 1996
Publication title -
entomologia experimentalis et applicata
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.765
H-Index - 83
eISSN - 1570-7458
pISSN - 0013-8703
DOI - 10.1111/j.1570-7458.1996.tb00833.x
Subject(s) - diapause , overwintering , biology , larva , population , incidence (geometry) , third generation , first generation , pupa , zoology , ecology , demography , telecommunications , physics , computer science , optics , sociology
The partial trivoltinism and overwintering of Kytorhinus sharpianus Bridwell (Coleoptera: Bruchidae) was studied in the Kanto district, Japan. The later in the summer eggs were laid by the first‐generation adults, the higher was the incidence of larval diapause in the second generation. The incidence of diapause also fluctuated between years, influencing the abundance of third‐generation larvae. A relatively large proportion of third‐generation larvae did not attain the diapause stage by the beginning of winter. The diapause development of larvae in diapause was completed by mid‐January. Immature larvae of the third generation also overwintered and emerged as adults in the spring.