Rice bugs are the most important pests in rice cultivation. Six prefectural agricultural experiment stations in the Tohoku region together with the NARO Tohoku Agricultural Research Center conducted a regional survey to determine the occurrence of rice bugs and pecky rice damage from 2003 to 2013. We focused particularly on the transition of species composition of rice bugs in the last decade : the sorghum plant bug Stenotus rubrovittatus has become a dominant species among rice bugs in prefectures along the Sea of Japan and in several other locations. The management options addressed by the six prefectural agricultural experiment stations were also reviewed to improve rice bug management. In the last decade, rice damage varied, with high levels of damage in 2003, 2005 and 2010. Range expansion and a population increase in S. rubrovittatus started in 2007 in the Prefectures of Aomori, Akita, Yamagata and Fukushima. Factors enhancing pecky rice damage, the diffusion of rice grain graders, a high incidence of rice bug advisories, and future directions were also discussed.
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東北地域における斑点米カメムシ類：2003-2013年の発生動向と被害実態
tarc_report_No117p63-115p.pdf
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