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Development Model of the Foxglove Aphid, Aulacorthum solani (Kaltenbach) on Lettuce

상추에서의 싸리수염진딧물(Aulacorthum solani)의 발육과 발육모형

  • Lee, Sang-Guei (Applied entomology Division, National Institute of Agricultural Science and Technology, RDA) ;
  • Kim, Hyeong-Hwan (Horticultural Environment Division, National Horticultural Research Institute, RDA) ;
  • Kim, Tae-Heung (Faculty of Biological Resources Science, College of Agriculture and Life Sciences, Institute for Biodiversity Reaserch, Chonbuk National University) ;
  • Park, Gil-Jun (Faculty of Biological Resources Science, College of Agriculture and Life Sciences, Institute for Biodiversity Reaserch, Chonbuk National University) ;
  • Kim, Kwang-Ho (Applied entomology Division, National Institute of Agricultural Science and Technology, RDA) ;
  • Kim, Ji-Soo (Muju Agricultural Technology Center)
  • 이상계 (농업과학기술원 농업해충과) ;
  • 김형환 (원예연구소 원예환경과) ;
  • 김태흥 (전북대학교 농업생명과학대학 생물자원과학부) ;
  • 박길준 (전북대학교 농업생명과학대학 생물자원과학부) ;
  • 김광호 (농업과학기술원 농업해충과) ;
  • 김지수 (무주군 농업기술센터 기술지원과)
  • Published : 2008.12.30

Abstract

The development of Aulacorthum solani (Kaltenbach) was studied at temperatures ranging from 12.5 to $27.5^{\circ}C$ under $65{\pm}5%$ RH, and a photoperiod of 16:8 (L:D). Mortality of $1st{\sim}2nd$ nymph was higher than that of $3rd{\sim}4th$ nymph at the most temperature ranges whereas at high temperature of $27.5^{\circ}C$, more $3{\sim}4th$ nymph stage individuals died. The total developmental time ranged from 16.9 days at $12.5^{\circ}C$ to 6.6days at $22.5^{\circ}C$, suggesting that higher the temperature, faster the development. However, at higher temperature of $25^{\circ}C$ the development took 7.4 days. The lower developmental threshold temperature and effective accumulative temperatures for the total immature stage were $0.08^{\circ}C$ and 162.8 day-degreeslated development. The nonlinear shape of temperature rewas well described by the modified Sharpe and DeMichele model. When the normalized cumulative frequency distributions of developmental times for each life stage were fitted to the three-parameter Weibull function, attendance of shortened developmental times was apparent with in $1{\sim}2nd$ nymph, $3{\sim}4th$ nymph, and total nymph stages in descending order. The coefficient of determination $r^2$ ranged between 0.86 and 0.91.

싸리수염진딧물(Aulacorthum solani)의 온도별 발육상을 조사하기 위해 $12.5^{\circ}C$에서 $27.5^{\circ}C$까지 $2.5^{\circ}C$ 간격으로 7개 온도에서 조사를 하였으며, 상대습도는 $65{\pm}5%$, 광주기는 16L:8D 조건으로 처리하였다. 일반적으로 진딧물의 약충 단계는 1령${\sim}$4령까지로 구분하나 본 연구에서는 1${\sim}$2령과 3${\sim}$4령으로 구분하였다. 대부분의 온도에서 사망률은 1${\sim}$2령과 3${\sim}$4령 약충이 유사하였으나, $27.5^{\circ}C$에서는 오히려 3${\sim}$4령의 사망률이 66.7%로 대부분을 차지하였다. 온도별 발육기간은 $12.5^{\circ}C$에서 16.9일로 가장 길었고 온도가 상승함에 따라 점차 짧아져 $22.5^{\circ}C$에서는 6.6일로 가장 짧았으나, $25^{\circ}C$에서는 오히려 7.4일로 발육 기간이 길어지는 양상을 보였다. 약충의 발육영점온도는 $0.08^{\circ}C$이고, 유효적산온도는 162.8일도였다. 각 온도별 발육률은 변형된 Sharpe와 DeMichele의 비선형 모형에 잘 적합 되었다. 발육단계별 발육기간을 표준화하여 누적시킨 값을 3개의 변수를 갖는 Weibull function에 적용했을 때 1${\sim}$2령 < 3${\sim}$4령 < 전체 약충 순으로 발육기간이 짧아지는 경향을 보여 주었고, $r^2$는 0.86${\sim}$0.91로 나타났다.

Keywords

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