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Thrips (Thysanoptera: Thripidae) on the flowers of a dioecious plant, Dioscorea japonica (Dioscoreaceae)

Published online by Cambridge University Press:  02 April 2012

Inoue Mizuki ,
Naoya Osawa  and
Tadaaki Tsutsumi
Inoue Mizuki*
Affiliation:
Laboratory of Forest Biology, Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo, Kyoto 606-8502, Japan
Naoya Osawa
Affiliation:
Laboratory of Forest Ecology, Graduate School of Agriculture, Kyoto University, Oiwake-cho, Kitashirakawa, Sakyo, Kyoto 606-8502, Japan
Tadaaki Tsutsumi
Affiliation:
Department of Environmental System Management, Faculty of Symbiotic Systems Science, Fukushima University, 1 Kanayagawa, Fukushima 960-1296, Japan
*
1 Corresponding author (e-mail: [email protected]).
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Extract

The genus Dioscorea L. (Dioscoreaceae) is widely distributed throughout Africa and Asia and includes 500 to 650 species (Burkill 1960; Miège and Lyonga 1982), almost all of which are dioecious (Terauchi 1990). Pollination of species in this genus has received little attention because many of the cultivated species are propagated vegetatively from tubers. Insect visitors to flowers have been reported for two species, D. alata L. from India (Abraham and Nair 1990) and D. rotundata Poir. from Nigeria (Pitkin 1973; Segnou et al. 1992; Bournier 1994). Dioscorea japonica Thunb. is found throughout Japan, Korea, and China (Ohwi and Kitagawa 1983), but insect visitors to the flowers have not previously been reported. We investigated the insect visitors to flowers of D. japonica because the insect fauna associated with one species of a genus often differs from that associated with other species of the genus and may vary within a single species between different geographic regions (Kobayashi et al. 1999).

Type
Articles
Information
The Canadian Entomologist , Volume 137 , Issue 6 , December 2005 , pp. 712 - 715
Copyright
Copyright © Entomological Society of Canada 2005

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