Mass flight activity of Lyonetia prunifoliella malinella (Lepidoptera : Lyonetiidae) with special reference to mating and dispersal

概要

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During observations from September to November, flight activity of Lyonetia prunifoliella malinella occurred in the morning and in the evening outside the crowns of apple and shelter trees. The morning flight started about half an hour before sunrise. About 15 min later, the number of flying moths increased rapidly and swarms formed. The swarms lasted for about half an hour. Although females were present in the tree crown, they did not participate in the swarms, which were composed only of males. Mating began during the time when the males were swarming, and most of the mating pairs separated by noon. The evening flight started around sunset. It did not develop into swarms and finished in about half an hour. The evening flights were composed of both males and females, with the latter including both virgin and fertilized females. During the evening flight, it was noted that some moths were flying out of view. Simultaneously it was found that the moths flying into view alighted on the shelter trees. Thus, flight in the morning was considered to be associated with mating, while that in the evening with dispersal.
日本応用動物昆虫学会の論文