札幌市におけるアワヨトウ多発世代成虫の発生圃場周辺での消長と性成熟程度および集団吸蜜行動の観察

概要

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An outbreak of the oriental armyworm moth, Pseudaletia separata WALKER, occurred in summer, 1987 in Hokkaido. We surveyed the behavior of the first (outbreak) generation from late July to mid August in Sapporo. Daily emergence from pupae collected from outbreak pastures showed a clear peak in late July. Daily numbers of moths captured by dry grass bait traps, raw sugar bait traps and light traps peaked on 30 July, 30 July and 1 August, respectively. In early August, captured females were virgin and their ovarioles were previtellogenesis stage. By mid August, most females had copulated and their ovarioles had developed. We found and caught many moths in insect collecting nets in and around outbreak pastures in late July, but no moths were found in early August. No females captured in the outbreak pastures had copulated and their ovarioles had not developed to the vitellogenesis stage. We observed moths congregating on Japanese linden trees where they sucked flower nectar during the day in late July to early August. After the flowering finished in early August. the moths disappeared on and around the trees. All females captured sucking nectar were virgin and their ovarioles were at the previtellogenesis stage.
日本応用動物昆虫学会の論文
1995-08-25