The Korean Journal of Pesticide Science (농약과학회지)

The Korean Society of Pesticide Science (한국농약과학회)
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Insecticidal Activities of Polymers and Surfactants Against Sweet Potato Whitefly, Bemisia tabaci (Hemiptera: Aleyrodidae)

담배가루이에 대한 폴리머와 전착제의 살충효과

  • Yoon, Chang-Mann (Dept. of Plant Medicine, Chungbuk National University) ;
  • Cho, Sun-Ran (Dept. of Plant Medicine, Chungbuk National University) ;
  • Moon, Sang-Rae (Dept. of Plant Medicine, Chungbuk National University) ;
  • Shin, Youn-Ho (Dept. of Plant Medicine, Chungbuk National University) ;
  • Kim, Gil-Hah (Dept. of Plant Medicine, Chungbuk National University)
  • Received : 2011.06.02
  • Accepted : 2011.06.13
  • Published : 2011.06.30
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Abstract

This study was performed to evaluate the polymers and surfactants as the potential control agents of sweet potato whitefly Bemisia tabaci, which is causing problems in ornamental garden and greenhouse. Polymers have an insecticidal activity to knock down and to be lethal to small winged insects by its viscosity. Among five polymers tested at 0.2% concentration, polinol P-24 showed the highest insecticidal activity as 59.4% against B. tabaci adult in cylindrical chamber, and followed by polinol P-20 (insecticidal activity, 57.1%). When treated at 0.1 % or 0.3% concentrations, Polinol P-24 also showed the highest insecticidal activity with 43.3% and 54.5%, respectively. Among eight surfactants tested, insecticidal activity was the highest in 0.0005% NP10 treatment (70.0%), and followed by 0.001% NP7 (67.4%). The synergistic effect between polinol P-24 and eight surfactants was evaluated. After bioassays, the 0.2% polinol P-24 plus 0.005% NP10 was selected as a candidate control agent for controlling of B. tabaci adults. Polinol P-24/NP10 was showed the highest control efficacy against B. tabaci adults applied three times at three day-intervals in square rearing cage. In the greenhouse, the mixture treatment showed good control value over 70% seven days after treatment.

본 연구는 관상용 정원과 온실에서 문제를 야기하는 담배가루이(Bemisia tabaci) 성충의 잠재적 방제제로서 폴리머와 전착제를 이용하여 생물검정을 수행하였다. 폴리머는 점성의 특성이 있어 날개가 있는 작은 곤충에게 넉다운시키거나 치명적일 가능성이 있다. 5 종의 폴리머를 0.2%의 농도로 처리시, polinol P-24는 원통형챔버 안에서 담배가루이 성충에 대해 59.4% 이상의 가장 높은 살충활성을 보였으며 그 뒤를 polinol P-20(57.1%)이 따랐다 0.1%와 0.3%의 농도로 처리시, polinol P-24는 각각 43.4%와 54.5%의 살충활성을 보였다. 8종의 전착제를 실험한 결과 살충활성이 NP10(0.0005%)에서 70.0% 이상으로 가장 높게 나타났고 그 뒤로 NP7(0.001%)이 67.4%로 나타났다. 살충활성을 높이기 위하여, polinol P-24를 전착제와의 다양한 조합으로 상승효과를 평가하였는데, 0.2% polinol P-24와 0.005% NP10을 후보물질로 선발하여 포장에서 담배가루이 방제 실험을 실시하였다. Polinol P-24와 NP10는 담배가루이 성충에 대하여 실내에서 3일간격으로 3번처리시 가장 높은 살충활성을 보였다. 야외에서는 처리 후 7일후에 70% 이상의 방제가를 보였다.

Keywords

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