Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Development of an Emergence Model for Overwintering Eggs of Metcalfa pruinosa (Hemiptera: Flatidae)

미국선녀벌레(Metcalfa pruinosa) (Hemiptera: Flatidae) 월동난 부화 예측 모델 개발

  • Lee, Wonhoon (Animal and Plant Quarantine Agency) ;
  • Park, Chang-Gyu (Crop protection Division, Department of Crop Life Safety, National Academy of Agricultural Science) ;
  • Seo, Bo Yoon (Crop protection Division, Department of Crop Life Safety, National Academy of Agricultural Science) ;
  • Lee, Sang-Ku (Crop protection Division, Department of Crop Life Safety, National Academy of Agricultural Science)
  • Received : 2015.10.07
  • Accepted : 2016.02.04
  • Published : 2016.03.01
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Abstract

The temperature-dependent development of Metcalfa pruinosa overwintering eggs was investigated at ten constant temperatures (12.5, 15, 17.5, 20, 22.5, 25, 27.5, 30, 32.5, and $35{\pm}1^{\circ}C$, Relative Humidity 20~30%). All individuals collected before April 13, 2012 failed to develop into first instar larvae. In contrast, some individuals that were collected on April 11, 2013 successfully developed when reared under $20{\sim}32.5^{\circ}C$ temperature regimes. The developmental duration was shortest at $30^{\circ}C$ (13.3 days) and longest at $15^{\circ}C$ (49.6 days) in the fourth collected colony (April 26 2013). Developmental duration decreased with increasing temperature up to $30^{\circ}C$ and development was retarded at high-temperature regimes ($32.5^{\circ}C$). The lower developmental threshold was $10.1^{\circ}C$ and the thermal constant required to complete egg overwintering was 252DD. The Lactin 2 model provided the best statistical description of the relationship between temperature and the developmental rate of M. pruinosa overwintering eggs ($r^2=0.99$). The distribution of the developmental completion of overwintering eggs was well described by the 2-parameter Weibull function ($r^2=0.92$) based on the standardized development duration. However, the estimated cumulative 50% spring emergence dates of overwintering eggs were best predicted by poikilotherm rate model combined with the 2-parameter Weibull model (average difference of 1.7days between observed and estimated dates).

채집 시기에 따른 미국선녀벌레(Metcalfa pruinosa) 월동난 발육을 다양한 항온조건에서 조사하였다. 2012년의 경우 4월 13일 이전에 채집된 월동난은 부화에 실패하였으나, 2013년 4월 11일 채집한 개체들이 일부 온도 조건에서 성공적으로 부화하였다. 온도에 따른 월동난의 발육 조사 결과 $12.5^{\circ}C$와 $35^{\circ}C$를 제외한 모든 온도 조건에서 발육이 가능하였다. 2013년 4월 26일 채집하여 가온한 결과 $15^{\circ}C$에서 49.6일로 발육기간이 가장 길었고 $30^{\circ}C$에서 13.3일로 가장 짧았다. 온도가 증가함에 따라 발육기간이 짧아지는 경향을 보였으나 $32.5^{\circ}C$에서는 $30^{\circ}C$에서 보다 발육기간이 길어 고온에서 발육이 지연되는 현상을 보였다. 온도와 발육율과의 관계를 설명한 선형 모형을 이용하여 추정된 미국선녀벌레의 발육영점온도는 $10.1^{\circ}C$, 유효적산온도는 252.5DD였다. 온도 의존적인 발육율을 설명하기 위하여 사용된 선형 및 비선형 5개 모델 중 Lactin 2 모델이 가장 높은 해석력을 보여주었다. 월동난 개체군의 발육 완료를 설명하기 위해 사용된 Two-parameter Weibull 함수는 발육기간을 기반으로 하였을 경우 결정계수 0.92로 높은 결정력을 보였다. 개발된 발육율, 발육완료 모델들을 이용하여 추정된 50% 누적 우화일과 실측된 우화일의 차이를 보면 Poikilotherm rate 모델을 이용하여 추정한 결과가 세 지역 편차일의 평균이 1.7일로 상대적으로 다른 모델들 보다 가장 정확하게 50% 누적 부화일을 예측할 수 있었다.

Keywords

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