Distribution of Soy Bean Pod Gall Fly, <i>Asphondylia</i> sp. (Diptera, Cecidomyiidae)

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  • ダイズサヤタマバエの分布
  • ダイズサヤタマバエ ノ ブンプ エイブン

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Abstract

Soy bean pod gall fly is widely distributed in all over the Honshu, Shikoku, Kyushu and their surrounding small islands, but not distributed in the Hokkaido, therefore, northern limit of the distribution lies between Honshu and Hokkaido. Southern limit of the distribution was unable to elucidate in this survey, however, the most southern district of the confirmed distribution is Tanegashima Island, and this species has not been recorded in any southern islands other than Tanegashima.<br>This insect is not known to be distributed in Korea, Formosa and China, and also in the other regions of the world. This species seems to be a peculiar insect in Japan.<br>Generally, this insect pest is abundant in warmer regions and soy bean is heavily infested by the pest in the area of annual mean temperature above 14°C. But only a few damages caused by the pest are observed in cooler regions below 11°C. It will be able to say that the population of this insect gradually decreases towards northern cold region.

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