アワヨトウ成虫の糖蜜誘殺

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タイトル別名
  • On the Capture Records of Armyworm Moths, <i>Leucania separata</i> WALKER by Molassestraps
  • アワヨトウ セイチュウ ノ トウミツユウサツ

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Trapping of armyworm moths with molasses-traps was tested from 1964 to 1967 in Akita. Three emergence peaks were distinguished in the seasonal fluctuations of captured moth numbers in a year, and the total numbers of each emergence peak varied widely. When the total catch of an emergence peak increased from previous peak, the precipitation in larval stage tended to be relatively small. The seasonal fluctuation in numbers of males and females resembled each other. The degree of ovarial maturation of females captured consisted of various stages from immature to mature except in the 3rd emergence peaks of 1965 and 1966. In the 3rd emergence peaks of 1965 and 1966, which were relatively larger than other peaks, the ovaries of moths were almost immature. The seasonal fluctuation was different between the traps in paddy field and the ones in field. Two cases of catch were noticed; in one case moths were caught at all traps coincidentally in the rainy and heavy windy weather in the 3rd emergence peaks of 1965 and 1966, and in the other they were caught only at the traps near the grass field out of any particular relation to the weather in the 1st emergence peak of 1966.

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