한국응용곤충학회지 (Korean journal of applied entomology)

  • 제61권3호
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  • Pages.423-434
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  • 2022
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  • 1225-0171(pISSN)
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  • 2287-545X(eISSN)
한국응용곤충학회 (Korean Society of Applied Entomology)
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인공사료로 사육한 뒷흰가는줄무늬밤나방(Mythimna loreyi ) (밤나방과)의 발육과 생식 특성

Developmental and Reproductive Characteristics of Mythimna loreyi (Noctuidae) Reared on Artificial Diets

  • 김은영 (국립식량과학원 재배환경과) ;
  • 김이현 (국립식량과학원 재배환경과) ;
  • 정진교 (국립식량과학원 재배환경과)
  • Eun Young, Kim (Crop Cultivation and Environment Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • I Hyeon, Kim (Crop Cultivation and Environment Research Division, National Institute of Crop Science, Rural Development Administration) ;
  • Jin Kyo, Jung (Crop Cultivation and Environment Research Division, National Institute of Crop Science, Rural Development Administration)
  • 투고 : 2022.04.05
  • 심사 : 2022.06.17
  • 발행 : 2022.09.01
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초록

열대거세미나방(Spodoptera frugiperda)(밤나방과) 유충 사육을 위해 이전에 개발된 두 인공사료(N4와 N6)가 뒷흰가는줄무늬밤나방 (Mythimna loreyi)(밤나방과) 사육에도 적합하였다. 실험실 조건[25℃, 15:9 h (명:암) 광주기]에서 알기간은 4.9-5.2일, 유충기간은 22.3-23.2일로 두 사료 집단 사이에 큰 차이가 없었다. 한 사료 집단 내에서 번데기 기간은 암컷이 약 12.6-12.8일, 수컷이 14.1-14.5일이었고, 번데기 무게는 암컷이 약 345 mg, 수컷이 약 380 mg로, 암수 사이에 유의한 차이를 보였다. 유충의 용화율과 용의 우화율은 각각 91-94%와 91-95%로 두 사료집단 사에의 유의한 차이를 보이지 않았다. 성충 산란전 기간은 3.4일, 산란기간은 약 4.7-4.8일 이었다. 성충 수명은 암컷이 8.2일, 수컷이 10.3-12.4일로 수컷의 수명이 길었다. 암컷당 부화한 총 자손 수는 724-847마리였고, 최대 약 1,400마리였다. 생명표 분석에서 개체군 내적자연증가율(N4 집단 0.1181, N6 집단 0.1253)은 두 사료집단 사이에 유의한 차이가 없었다. 한 사료집단 내에서 유충 영기가 5령 혹은 6령까지 발육하는 개체변이가 발견되었다. N4 사료집단의 5령 개체 비율(약 22%)은 N6 사료집단의 5령 개체비율(약 7%)보다 높았다. 6령 개체들의 평균 유충기간이 5령 개체들보다 더 길었다. 유충의 영기별 두폭은 1령의 약 308 ㎛부터 6령의 약 3,065 ㎛까지, 몸길이는 1령의 약 2.0 mm부터 6령의 약 29.1 mm까지 측정되었다. 2020년 6-7월 중에 옥수수 포장에서 뒷흰가는줄무늬밤나방 유충이 동속종인 멸강나방(M. separata) 유충과 함께 발견되었다.

The two previously developed artificial diets (N4 and N6) used for rearing Spodoptera frugiperda (Noctuidae) larvae, were selected as highly-fit ones for rearing Mythimna loreyi larvae. Almost all biological characteristics were not significantly different between the colonies reared on the two diets at 25℃ and 15:9 h (light:dark) photoperiod. The developmental periods were 4.9-5.2 days for eggs, and 22.3-23.2 days for larvae. The pupal period and weight were different between the sexes in each diet colony. The pupal periods in females and males showed 12.6-12.8 days and 14.1-14.5 days, respectively. The pupal weights were ca. 345 mg for females and ca. 380 mg for males. The pupation and emergence rates were ca. 91-94%, and ca. 91-95%, respectively, without significant differences between the two colonies. The pre-oviposition and oviposition periods were 3.4 days and 4.7-4.8 days, respectively. The adult longevity was 8.2 days in females and 10.3-12.4 days in males. Total offsprings produced were found to be 724-847 larvae on an average with ca. 1,400 maximum larvae. In the life table analysis, the intrinsic rates of increases (0.1181 for N4 and 0.1253 for N6) were not significantly different between the two colonies. Individual differences in the larval instar number 5 and 6 were found within a diet colony. The ratios of 5-instar larvae were ca. 22% in N4 colony and ca. 7% in N6 colony. The larval period of 6-instar larvae was longer than that of 5-instar larvae. Width of head capsule in larvae varied from ca. 309 ㎛ for 1st instar to ca. 3,065 ㎛ for 6th instar. Body lengths measured from ca. 2.0 mm for 1st instar to ca. 29.1 mm for 6th instar. Larvae of M. loreyi and M. separata were found at the same time in a maize field during June and July, 2020.

키워드

과제정보

본 연구는 농촌진흥청 어젠다 연구과제(PJ01503802)를 수행하는 과정에서 얻은 결과를 바탕으로 작성되었다.

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