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Intraspecific variations in life history traits of two pecky rice bug species from Japan: mapping emergence dates and number of annual generations
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  • Kazuhisa Yamasaki,
  • Ken Tabuchi,
  • Akihiko Takahashi,
  • Takeshi Osawa,
  • Akira Yoshioka,
  • Yasushi Ishigooka,
  • Shigeto Sudo,
  • Mayura TAKADA
Kazuhisa Yamasaki
Institute for Sustainable Agro-Ecosystem Services, Graduate School of Agricultural and Life Sciences, The University of Tokyo
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Ken Tabuchi
Division of Agro-Environment Research, Tohoku Agricultural Research Center, NARO
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Akihiko Takahashi
Hokuriku Research Station, Central Region Agricultural Research Center, NARO
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Takeshi Osawa
Nanional Institute for Agro-Environmental Sciences
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Akira Yoshioka
Fukushima Branch, National Institute for Environmental Studies
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Yasushi Ishigooka
Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, NARO
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Shigeto Sudo
Institute for Agro-Environmental Sciences, National Agriculture and Food Research Organization, NARO
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Chuo University Faculty of Science and Engineering Graduate School of Science and Engineering
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The mirid bugs Stenotus rubrovittatus and Trigonotylus caelestialium, which cause pecky rice, have become a threat to rice cultivation in Asia. Damage caused by these pests has rapidly become frequent since around 2000 in Japan. Their expansion pattern is not simple, making it difficult to manage them by prediction. Some insects with wide distributions have locally adapted variations in life-history traits. We performed laboratory rearing experiments to assess the geographical scale of intraspecific variations in life-history traits of S. rubrovittatus and T. caelestialium. These were aimed at increasing the accuracy of occurrence estimates and the number of generations per year. These results were compared with previous research, and differences in development rates were observed between populations of different latitudes, but not of the same latitude. Finally, plotting the timing of adult emergence and the potential number of generations per year on maps with a 5-km grid revealed that they differed greatly locally at the same latitude. These maps can be used for developing more efficient methods of managing mirid bugs in integrated pest management.

Peer review status:IN REVISION

17 Dec 2020Submitted to Ecology and Evolution
18 Dec 2020Assigned to Editor
18 Dec 2020Submission Checks Completed
11 Jan 2021Reviewer(s) Assigned
14 Feb 2021Review(s) Completed, Editorial Evaluation Pending
25 Feb 2021Editorial Decision: Revise Minor