Flight Activities of Larger Black Chafer (Holotrichia morosa Waterhouse) and Korean Black Chafer (H. diomphalia Bates)

큰검정풍뎅이와 참검정풍뎅이 성충의 비상활동

  • 김기황 (한국인삼연초연구소)
  • Published : 1990.12.01

Abstract

The flight activities of Holotrichia morosa Watershouse and H. diomphaia Bates adults were monitored by blacklight traps for six years from 1984 to 1989. The flight activity of H. morosa adults was most prominent from late June to early August with a peak flight in mid July, and that of H. diomphalia adults mainly occurred from early May to late June of odd years with the peak flight dates varying year by year. The flight activities of the two species during the fight period became vigorous after moderate to heavy rainfalls. The overwintered adults of H. diomphalia seemed to begin flying when the daily mean temperature rose above $15^{\circ}C$. The ratios of the females to the total adults collected by the blacklight traps were 53.3% for H. morosa and 0% for H. diomphalia, although the female sex ratio of the latter species was 57.4% in the field.

Keywords

Holotrichia morosa;H. diomphalia;flight activity;rainfall;sex ratio