The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Control Efficacy of Environment-friendly Agricultural Materials against Alfalfa Weevil, Hypera postica Gyllenhal at Chinese Milk Vetch Field

자운영포장에서 알팔파바구미에 대한 친환경농자재의 방제효과

  • Bae, Soondo (Cereal Crop Division, National Institute of Crop Science) ;
  • Mainali, Bishwo Prasad (Cereal Crop Division, National Institute of Crop Science) ;
  • Choi, Byeongryel (Plant Protection Division, National Academy of Agricultural Science) ;
  • Yoon, Youngnam (Cereal Crop Division, National Institute of Crop Science) ;
  • Kim, Hyunju (Cereal Crop Division, National Institute of Crop Science)
  • Received : 2013.11.11
  • Accepted : 2014.01.20
  • Published : 2014.03.31
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Abstract

This study was conducted to evaluate pest control efficacy of environment-friendly agricultural materials (EFAMs) according to their spray time and frequency against alfalfa weevil, Hypera postica Gyllenhal, at Chinese milk vetch field in Miryang, Korea. Larva, pupa and adult of H. postica occurred more in year 2010 than those in 2011, and the larval population peaked 5 days faster in year 2010 than on $10^{th}$ May in 2011. Control efficacies of EFAMS sprayed on various time and in several frequencies to H. postica during April in 2010 were 73.6%, 71.9% and 66.2% at single spray in early, middle and late April, respectively and ranged from 77.1% to 78.9% when sprayed twice. With three times spray the control efficacy averaged 87.2%. Control efficacies of EFAMs with a single application in early, middle and late April in 2011 were 57.9%, 66.8% and 65.2%, respectively and ranged from 73.7% to 76.8% when sprayed twice. Control efficacy averaged with 82.7% when EFAMs were sprayed for three times. Accordingly, control efficacy of EFAMs against was increased with increasing spray frequency. Among the tested, Ungsamee(R), Wangjoongwangeco(R) and Muchungjidae(R) with a single application showed relatively higher control efficacy with a 4 to 16% lower control rate than a chemical insecticide, etofenprox 20EC. Therefore, Ungsamee(R), Wangjoongwangeco(R) and Muchungjidae(R) can be effectively used for management of H. postica when sprayed at early April for high occurring population and middle April for low occurring population with a single spray.

밀양의 자운영 포장에서 친환경농자재의 처리시기(4월 상순, 중순 및 하순) 및 횟수(1, 2회 및 3회)에 따른 알팔파바구미의 방제효과를 평가하였다. 알팔파바구미의 유충, 번데기 및 성충은 2011년보다 2010년에 발생량이 많았으며, 특히 유충의 발생량 차이가 현저하였고, 발생피크도 2011년의 5월 10일보다 5일 빨랐다. 친환경농자재의 알팔파바구미에 대한 평균 방제효과는 2010년에 1회 처리는 4월 상순, 중순 및 하순에 각각 73.6%, 71.9% 및 66.2%이었으며, 2회 처리는 77.1~78.9%로 처리시기조합에 따른 차이가 없었고, 3회 처리는 87.2%였다. 2011년의 평균방제효과는 1회 처리는 4월 상순, 중순 및 하순에 각각 평균 57.9%, 66.8% 및 65.2% 이었으며, 2회 처리는 73.7~76.8%로 처리시기조합에 따른 큰 차이가 없었고, 3회 처리는 평균 82.7% 이었다. 따라서 알팔파바구미의 방제효과는 방제횟수가 증가할수록 증가되었다. 응삼이$^{(R)}$, 왕중왕에코$^{(R)}$ 및 무충지대$^{(R)}$는 알팔파바구미에 효과적인 친환경방제제로 이들 자재의 1회 처리에 의한 방제효과는 화학농약인 ethofenprox 20EC에 비해 4~16% 낮았다. 그러므로 응삼이$^{(R)}$, 왕중왕에코$^{(R)}$ 및 무충지대$^{(R)}$는 알팔파바구미의 친환경적 방제에 효과적으로 사용할 수 있으며, 방제시기 및 횟수는 알팔파바구미의 발생량을 고려하여 달라질 수 있지만, 1회 방제의 경우 발생량이 많은 경우는 4월 상순, 발생량이 적은 경우는 4월 중순이 효과적인 것으로 나타났다.

Keywords

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