Temperature-dependent Development of Aphis gossypii Glover and Aphis egomae Shinji on Leaves of Green Perilla and Their Seasonal Abundance Patterns in Protected Greenhouse in Guemsan, Korea

들깨 잎에서 목화진딧물(Aphis gossypii Glover)과 들깨진딧물(Aphis egomae Shinji)의 온도발육 및 금산지역 잎들깨 시설하우스에서 발생소장

  • Choe, Yong-Seok (Bioenvironment Research Division, Chungnam Agricultural Research & Extention Services) ;
  • Park, Deok-Gi (Byeinsect Co. LTD., Kongju National Univ.) ;
  • Han, Kwang-Seop (Bioenvironment Research Division, Chungnam Agricultural Research & Extention Services) ;
  • Choe, Kwang-Ryul (Department of Applied Biology, Chungnam National Univ.)
  • Published : 2006.12.30

Abstract

Temperature-dependent development studies of two aphid species, A. egomae and A. gossypii occurring in green perilla greenhouse were conducted at $15{\sim}35^{\circ}C$, and 16:8 (L:D h) of light period in the laboratory. The mortality of two aphid species was high in young stages (1st and 2nd). In A. egomae, the mortalitiy increased with increasing and decreasing temperature: the mortalitie at $15^{\circ}C$ and $35^{\circ}C$ were 22.3% and 15.6%, respectively. While the mortalities of A. gossypii increased with increasing temperature: the mortality at $35^{\circ}C$ was 50.0%. The developmental periods of A. egomae and A. gossypii ranged from 20.8days to 5.4days and from 22.6days to 9.1days at $15^{\circ}C$ to $30^{\circ}C$ of temperature resion, respectively, and were 7.2days and 10.7days at $35^{\circ}C$ for each species. The lower developmental threshold temperatures for total nymphs of A. egoame and A. gossypii were $9.9^{\circ}C$ and $4.9^{\circ}C$, respectively and an effective degree-days (DD) for the developmental completion of total nymph were 108.0 DD for.A. egomae and 221.2DD for A. gossypii. In green perilla greenhouse, the occurrence period of A. gossypii was earlier about 15 days than that of A. egomae. When the occurrence period of two aphid species was estimated by degree-days based on lower threshold temperatures, A. gossypii occurred earlier than A. egomae in the field. A. gossypii occurred from early April and showed dominant position to late May compared with A. egomae Whereas, A egomae started to occur from mid April and then were abundant after late May followed by abrupt population crash around late July.

잎들깨 시설하우스에서 발생하는 들깨진딧물과 목화진딧물의 발육실험은 $15{\sim}35^{\circ}C$, 광주기 16:8(L:D h)에서 수행하였다. 진딧물 약충의 사망률은 초기 1-2령충이 대부분을 차지하였고, 온도의 상승에 따라 사망률이 높아져 $35^{\circ}C$에서 들깨진딧물과 목화진딧물의 전체약충 누적사망률은 각각 15.6%와 50.0% 였다. 들깨진딧물의 경우 $35^{\circ}C$에서 령기별 사망률에 큰 차이는 없었으나, 목화진딧물의 경우 고온에서 1-2령충보다 3-4령충의 사망률이 각각 12.2%와 15.6%로 높았다. 들깨진딧물과 목화진딧물 전체약충의 온도별 발육기간이 $15-30^{\circ}C$까지 온도의 상승에 따라 각각 $20.8{\sim}5.4$일, $22.6{\sim}9.1$일로 짧아지는 경향을 보였고, 고온의 영향을 받은 것으로 생각되는 $35^{\circ}C$에서는 오히려 발육기간이 각각 7.i일, 10.7일로 길어졌다. 발육영점온도는 들깨진딧물이 $9.9^{\circ}C$, 목화진딧물이 $4.9^{\circ}C$였고, 유효적산온도는 들깨 진딧물이 108.0일도, 목화진딧물이 221.2일도 였다. 잎들깨 시설하우스에서의 발생시기는 목화진딧물이 들깨진딧물보다 약 15일 정도 빨랐다. 목화진딧물은 4월 초순에 발생하여 5월 하순 발생최성기를 보였고 들깨진딧물은 4월 중순 발생하여 7월 상준 발생최성기를 보였다.

Keywords

References

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