東北地方において大豆を加害するヒメサヤムシガ類(予報)

概要

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Four Matsumuraeses species were found to damage soybeans in Tohoku district. Among these, the number of M.phaseoli was low whereas M.falcana was extensively found on soybeans and other leguminous crops. Soybean injury by M.ussuriensis and M.vicina was sporadical in spite of their high abundance on wild Pueraria. Discrimination of these species depending on the developmental stages was also made posible. M.falcana passed two generations on soybeans after July presumably with no diapause stage, and the later generation experienced high mortality rate in winter. The life cycle of M.falcana in the early season preceding with infestation of soybeans requires further studies. Most of the first generation pupae of M.ussuriensis entered a hibernation diapause, and the multivoltine counterparts usually passed a summer diapause. M.vicina was virtually bivoltine, and the second generation overwintered as pupae in diapause. The relationship between soybean infestation with these species and seasonal soybean growth was discussed.
1983-02-25