Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Construction and Evaluation of Cohort Based Model for Predicting Population Dynamics of Riptortus pedestris (Fabricicus) (Hemiptera: Alydidae) Using DYMEX

상용소프트웨어(DYMEX)를 이용한 톱다리개미허리노린재(Riptortus pedestris) 밀도 변동 양상 예측 모델 구축 및 평가

  • Park, Chang-Gyu (Crop protection Division, Department of Crop Life Safety, National Academy of Agricultural Science) ;
  • Yum, Ki-Hong (R&D Trialing team, Syngenta Korea Ltd.) ;
  • Lee, Sang-Ku (Crop protection Division, Department of Crop Life Safety, National Academy of Agricultural Science) ;
  • Lee, Sang-Guei (Crop protection Division, Department of Crop Life Safety, National Academy of Agricultural Science)
  • 박창규 (국립농업과학원 농산물안전성부 작물보호과) ;
  • 염기홍 (신젠타코리아 진천연구소) ;
  • 이상구 (국립농업과학원 농산물안전성부 작물보호과) ;
  • 이상계 (국립농업과학원 농산물안전성부 작물보호과)
  • Received : 2015.02.10
  • Accepted : 2015.04.15
  • Published : 2015.06.01
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Abstract

A Cohort based model for temperature-dependent population dynacmics of Riptortus pedestris was constructed by using a commercial software (DYMEX) and seasonal occurrence along with pesticide treatments effect was simulated and validated with pheromone trap data. Ten modules of DYMEX software were used to construct the model and Lifecycle module was consisted of seven developmental stages (egg, 1 - 5 nymphal instars, and adult) of R. pedestirs. Simulated peaks of adult populations occurred three or four times after the peak of overwintered populations which was similar to those observed from pheromone trap catch. Estimated dates for the second peak were quite similar (1-2 day difference) with those observed with pheromone trap. However, the estimated dates for the first population peak were 9-16 days later than the observed dates by pheromone trap and the estimated dates for the last peak were 17-23 days earlier than the observed dates. When insecticide treatments were included in the simulation, the biggest decrease in R. pedestris adult density occurred when insecticide was applied on July 1 for the first peak population: the estimated adult density of the second peak was 3% of untreated population density. When insecticide was assumed to be applied on August 30 for the second peak population, the estimated adult density of the following generation was about 25% of untreated population and the peak density of the following generation reached about two weeks later than untreated population. These results can be used for the efficient management strategies for the populations of R. pedestris.

온도에 따른 톱다리개미허리노린재 (Riptortus pedestris)의 개체군 밀도 변동 예측 모델을 상용 소프트웨어인 DYMEX로 구축하고 월동 성충밀도를 바탕으로 한 연간 발생 밀도 변동 패턴과 살충제 처리 시기에 따른 밀도 억제 효과를 시뮬레이션하였다. 구축된 모델은 총 10개의 모듈을 사용하였으며, Lifecycle 모듈은 알, 1, 2, 3, 4, 5령, 성충의 7개 발육 단계로 구성하였다. 월동 성충 개체군의 포획시기를 이용하여 연중 밀도 변동을 예측한 결과 연도에 따라 3~4번의 신 성충 발생이 가능하여 페로몬 트랩 포획밀도 조사와 유사하였다. 콩 포장으로 침입해 들어오는 두 번째 신성충의 경우 개발된 모델을 이용하여 예측된 성충 발생 최성일이 페로몬 트랩으로 조사된 포획 밀도 최성기와 거의 일치 하였다. 그러나 예측된 첫번째 신 성충 발생 최성일은 페로몬트랩 포획 최성기보다 연도에 따라 9~16일 늦었으며, 마지막 세대의 발생 최성일은 연도에 따라 페로몬 트랩 포획 최성기보다 17~23일 빨랐다. 살충제 사용을 가정한 첫 번째 신성충 개체군 밀도 억제가 다음 세대들의 밀도 증가에 미치는 영향을 시뮬레이션한 결과, 신 성충 발생 초기일수록 밀도 억제효과가 커서 7월 1일 살충제 처리를 가정하였을 때 다음 세대에 형성된 성충은 무처리의 3% 정도로 현저하게 낮았다. 또한 포장에 침입해 들어오는 두 번째 신성충 개체군을 대상으로 시기별 살충제 처리 효과를 시뮬레이션한 결과 8월 30일 살충제 처리를 가정한 경우 다음세대 성충 최고 밀도는 무처리의 25% 정도로 줄었고, 최고 밀도에 도달한 시기도 무처리에 비해 2주 이상 늦었다. 이상의 연구 결과들은 톱다리개미허리노린재의 효율적인 종합적 방제 계획을 세우는데 유용하게 사용될 수 있을 것으로 기대된다.

Keywords

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