Temperature-dependant development and seasonal occurrence of Cabbage armyworm (Mamestra brassicae L.) at Highland Chinese cabbage fields

도둑나방 (Mamestra brassicae L.)의 온도별 발육 특성과 고랭지배추 재배포장에서의 발생소장

  • Kwon, Min (Lab. of Crop Protection Research, Environment Management Division, National Institute of Highland Agriculture, RDA) ;
  • Kwon, Hye-Jin (Lab. of Crop Protection Research, Environment Management Division, National Institute of Highland Agriculture, RDA) ;
  • Lee, Seung-Hwan (Lab. of Insect Biosystematics, School of Agricultural Biotechnology, Seoul National University)
  • 권민 (농촌진흥청 고령지농업연구소 환경보전과 작물보호연구실) ;
  • 권혜진 (농촌진흥청 고령지농업연구소 환경보전과 작물보호연구실) ;
  • 이승환 (서울대학교 농생명공학부 곤충계통분류연구실)
  • Published : 2005.09.01

Abstract

This study was conducted to investigate the developmental characteristics of cabbage armyworm, Mamestra brassicae L. (Lepidoptera: Noctuidae) by different temperatures and its seasonal occurrence in pepper field. Under four constant temperatures, 15, 20, 22 and $25^{\circ}C$, developmental periods from egg to adult were 88.3, 63.0, 52.3, and 42.8 days, respectively, with egg periods being 9.2, 6.2, 5.0 and 3.9 days, and larval periods being 40.5, 30.1, 23.3 and 21.2 days, respectively. Developmental threshold and thermal requirement in degree-days (DD) were $7.9^{\circ}C$ and 69.4 DD for egg, $4.8^{\circ}C$ and 434.8 DD for larva and $6.7^{\circ}C$ and 344.8 DD for pupa. Fecundity of female increased as temperature increased laying 1262.1 eggs at $15^{\circ}C$, 1663.8 eggs at $20^{\circ}C$ and 1763.2 eggs at $25^{\circ}C$. Mean numbers of eggs per egg-mass were 99.4, 114.7 and 167.9 under the three constant temperatures, respectively. In Daegwallyeong highland area, this noctuid occurred from mid June to late August and has two generations a year reaching peak two times, one at late June and the other at early August.

도둑나방(Mamestra brassicae L.)의 온도별 발육특성과 고랭지배추포장에서의 발생소장을 조사하였다. 15, 20, 22, $25^{\circ}C$ 항온조건에서 알의 발육기간은 각각 9.2, 6.2, 5.0, 3.9일이었고, 유충의 발육기간은 각각 40.5, 30.1, 23.3, 21.2일이었다. 또한 알에서 성충으로 발육하기까지 각각 88.3, 63.0, 52.3, 42.8일이 소요되었다. 발육영점온도와 유효적산온도는, 알에 대해서 $7.9^{\circ}C$와 69.4 DD, 유충에 대해서 434.8 DD, 번데기에 대해서 $6.7^{\circ}C$와 344.8 DD이었다. 암컷의 총 산란수는 온도가 상승할수록 커졌는데, $15^{\circ}C$에서 1262.1개, $20^{\circ}C$에서 1663.8개, $25^{\circ}C$에서 1763.2개를 낳았다. 또한 난괴당 알의 수는 온도별로 각각 99.4, 114.7, 167.9개였다. 도둑나방 성충은 대관령 고랭지 배추재배지역에서 6월 중순부터 8월 하순까지 발생하였으며, 일년에 2회 발생하였는데, 6월 하순과 8월 초순에 각각 최대발생량을 보였다.

Keywords

References

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