Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Temperature-dependent Fecundity and Life Table Parameters of Aphis gossypii Glover (Homoptera: Aphididae) on Cucumber Plants

오이에서 온도에 따른 목화진딧물 산자수 및 생명표

  • Kim Ji-Soo (Organic Farming Technology Division, Crop Life Safety Department, National Institute of Agricultural Science and Technology. RDA) ;
  • Kim Tae-Heung (Faculty of Biological Resources Science, College of Agriculture and Life Sciences, Chonbuk National University)
  • 김지수 (농촌진흥청 농업과학기술원 친환경농업과) ;
  • 김태흥 (전북대학교 농과대학 생물자원과학부)
  • Published : 2004.09.01
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Abstract

Temperature-fecundity of the melon aphid, Aphis gossypii Glover, was studied at constant temperatures ranging from 15 to $32.5^{\circ}C$ under $60-70\%$ RH and a photoperiod of 16 : 8 (L : D) A life table parameters were constructed using the results. The longevity of A. gossypii gradually increased with decreasing temperature below $27.5^{\circ}C$. Also fecundity increased with decreasing temperature and the highest fecundity was 61.8 nymphs per female at $17.5^{\circ}C$. However. daily fecundity increased with increasing temperatures up to $22.5^{\circ}C$ showing 5.9 nymphs per day and thereafter decreased. Longevity and fecundity of the adult in the greenhouse with an average temperature of $21^{\circ}C$ and $65.6\%$ RH, were 20.0 days and 59.6, respectively, which were longer and higher than those in the growth chamber with similar conditions. net reproductive rate (Ro) was 54.9 at $17.5^{\circ}C$ while intrinsic rate of increase ($r_m$) and finite rate of increase ($\lambda$) were the highest 0.5 and 1.6 at $30^{\circ}C$, respectively. doubling time (DT) and mean generation time (T) were the shortest 1.4 and 6.8 at $30^{\circ}C$ indicating that optimal temperature for the development is $30^{\circ}C$.

목화진딧물(Aphis gossypii Glover)의 성충수명, 산자수는 15-32.5, 습도는 $60-70\%$, 광주기는 16L: 8D조건에서 조사하였고 이를 이용하여 생명표를 작성하였다. $27.5^{\circ}C$를 기준으로 온도가 내려감에 따라서 수명이 길어지고 산자수가 증가하였다. 특히 $17.5^{\circ}C$에서 산자수가 61.8마리로 가장 많았다. 이와 다르게 성충의 일일 출산 수는 $22.5^{\circ}C$까지 온도가 올라감에 따라 증가하였고(일일평균 5.6마리) 이후 감소하였다. 온실에서 성충수명은 20.0일, 산자수는 59.6마리로 $20^{\circ}C$의 항온조건보다 수명은 길고 산자수는 더 많았다. 목화진딧물의 생명표를 작성한 결과 순증가률(Ro)은 $17.5^{\circ}C$에서 54.9이였고, 내적자연증가률($r_m$)과 기간증가률($\lambda$)은 $30^{\circ}C$에서 0.5와 1.6으로 최고 값이었고, 배수기간(DT)과 평균세대기간(T)은 $30^{\circ}C$에서 1.4와 6.8로 가장 작았다. 따라서 이들 수치를 통해 보았을 때 목화진딧물이 생활사를 완성하는데 최적 조건은 $30^{\circ}C$라 생각한다.

Keywords

References

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