Seasonal Prevalence of the Seedcorn Fly Surveyed by the Kairomone Trap in Tokachi, Hokkaido
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概要
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Seasonal prevalence of the seedcorn fly, <I>Delia platura</I> (Meigen), was surveyed by using the kairomone, 2-phenylethanol 4 volume and n-valeric acid 1 volume, trap in Tokachi, Hokkaido. There wee two peaks of trap capture, in spring and a utumn, in each year from 1989 to 1991. Sex ratio of the captured adults were 23-35 % and percentage of females which had full matured eggs in captured females were 22-34%.
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