Comparison of the effects of landscape composition on two mirid species in Japanese rice paddies

Two rice bug species, Stenotus rubrovittatus (Matsumura) and Trigonotylus caelestialium (Kirkaldy) (Hemiptera: Miridae), are major rice pests in Japan. The populations of these insects are maintained by widely distributed host plants and by a broad range of movements among resource patches. To devel...

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Bibliographic Details
Published in:Applied entomology and zoology 2011-11, Vol.46 (4), p.519-525
Main Authors: Yasuda, Mika, Mitsunaga, Takayuki, Takeda, Ai, Tabuchi, Ken, Oku, Keiko, Yasuda, Tetsuya, Watanabe, Tomonari
Format: Article
Language:English
Subjects:
Abundance
Agriculture
Applied Ecology
Biomedical and Life Sciences
Boundaries
Entomology
Environmental Management
Hemiptera
Host plants
Landscape
Life Sciences
Miridae
Original Research Paper
Oryza sativa
Pest control
Plant Pathology
Reclaimed land
Rice fields
Risk factors
Stenotus
Trigonotylus
Zoology
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Summary:Two rice bug species, Stenotus rubrovittatus (Matsumura) and Trigonotylus caelestialium (Kirkaldy) (Hemiptera: Miridae), are major rice pests in Japan. The populations of these insects are maintained by widely distributed host plants and by a broad range of movements among resource patches. To develop an effective pest management strategy for a region where two rice bug species coexist, the impacts of the surrounding landscape and of weed-infested field boundaries on the field abundances of the two rice bug species were compared. Field abundances of the two species were estimated using the sweep-netting technique. The number of weed-infested field boundaries was also counted within a 100 m radius around 14 study paddies at three sites in Japan. The distinctive features of the surrounding landscape furnished the best predictor at a spatial scale radius of 300 m for S. rubrovittatus and at 200–300 m for T. caelestialium . The abundances of both species increased as the amounts of weed-infested area and reclaimed land increased. The size and number of sources also affected the two rice bug species. These results emphasize that adequate field boundary management can reduce the risk of high pest abundance in the fields, even when an extensive weed-infested area exists within the functional scale of the species.
ISSN:0003-6862
1347-605X
DOI:10.1007/s13355-011-0071-9