Korean journal of applied entomology (한국응용곤충학회지)

Korean Society of Applied Entomology (한국응용곤충학회)
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Ecological Characteristics of 28-spotted Larger Lady Beetle, Henosepilachna vigintioctomaculata (Motschulsky) (Coleoptera: Coccinellidae) and Its Seasonal Fluctuation in Gangneung, Korea

큰이십팔점박이무당벌레(Henosepilachna vigintioctomaculata (Motschulsky))의 생태적 특성 및 강릉지역 발생소장

  • Kwon, Min (Highland Agriculture Research Center, National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Ju-Il (Highland Agriculture Research Center, National Institute of Crop Science, Rural Development Administration) ;
  • Kim, Jeom-Soon (Highland Agriculture Research Center, National Institute of Crop Science, Rural Development Administration)
  • 권민 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 김주일 (농촌진흥청 국립식량과학원 고령지농업연구센터) ;
  • 김점순 (농촌진흥청 국립식량과학원 고령지농업연구센터)
  • Received : 2010.07.16
  • Accepted : 2010.09.08
  • Published : 2010.09.30
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Abstract

The seasonal fluctuation of the large 28-spotted lady beetle, Henosepilachna vigintioctomaculata (Motschulsky), was observed in potato fields of Gangneung region, Gangwondo Province. The effects of their leaf consumption over a 24 hour period and developmental periods by different temperatures were investigated, and then the developmental threshold (DT) and effective cumulative temperature (ET) of each stage were calculated. Various developmental stages of H. vigintioctomaculata were captured in the fields from May to September, with three peaks in late May, late June, and late August. Leaf consumption by larval stages increased with the development of instar. The 4th instar larvae consumed potato leaves much more than other stages. Egg hatchability and emergence rate of H. vigintioctomaculata were lower at $10^{\circ}C$ and $30^{\circ}C$, but higher at around $20{\sim}23^{\circ}C$. The developmental periods of each stage became shorter as temperature increased; 90 days at $10^{\circ}C$, 40 days at $20^{\circ}C$ and 25 days at $25^{\circ}C$. Base on developmental velocity to temperature, calculated DT and ET were $7.3^{\circ}C$ and 83.

큰이십팔점박이무당벌레(Henosepilachna vigintioctomaculata (Motschulsky))의 강릉지역 발생소장과 발육단계별 감자잎 섭식량 및 온도별(10, 15, 20, 25, $30^{\circ}C$) 발육소요기간을 조사하였다. 큰이십팔점박이무당벌레는 연 3회, 즉 5월 하순, 6월 하순 및 8월 하순에 발생하였으며, 특히 5월 하순부터 7월 중순까지 높은 밀도로 발생하여 감자 식물체를 집중적으로 가해하였다. 발육단계별 감자잎 섭식량은 유충의 영기가 진전될수록 많았으며, 4령 유충기에 가장 많은 섭식량을 보였다. 큰이십팔점박이무당벌레 부화율과 우화율은 각각 $10^{\circ}C$ 및 $30^{\circ}C$에서는 매우 낮았고 $20{\sim}23^{\circ}C$에서 가장 높았다. 알에서 성충으로 우화되기까지 발육단계별 생육기간은 온도가 증가함에 따라 감소하였는데, $10^{\circ}C$에서 90일 정도로 매우 느렸으며 $20^{\circ}C$에서는 40여일, $25^{\circ}C$에서는 25일이 소요되었다. 또한 발육영점온도와 유효적산온도는 알에 대해서 $7.3^{\circ}C$와 83.3 DD, 유충에 대해서 $5.2^{\circ}C$와 294.1 DD, 번데기에 대해서 $6.2^{\circ}C$와 97.1 DD이었다.

Keywords

References

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