• Title/Summary/Keyword: 도태

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Studies on the Insecticide Resistance of the German Cockroach (Blattella germanica L.) II. Resistant Developments and Cross resistance (바퀴(Blattella germanica L.)의 살충제 저항성에 관한 연구. 2. 저항성 발현 및 교차저항성)

  • 방종렬;이형래;김정화
    • Korean journal of applied entomology
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    • v.32 no.2
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    • pp.129-133
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    • 1993

  • The German cockroach (Blattella germanical L.) populations were successively selected with chlorpyrifos and permethrin for xis generations. The resulting resistant strains, $R_{chlorpyrifos}$(Rc) and $R_{permethrin}$(Rp) were observed resistant development and the cross-resistance. The result indicated that the values of $LC_{50}$ were increased 3.32 and 2.10 times from the susceptible strain, respectively. In the Rc strains, the values of the $LC_{50}$ of fenvalerate, propoxur, permethrin were to 3.89, 2.97, and 1.31 times higher than that of the suseptible, respectively. In the Rp strains, the values of the $LC_{50}$ of fenvalerate, chlorpyrifos, and propoxur showed 5.23, 1.42, and 1.80 times cross-resistance.

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Control Weights On Supervised Kohonen Feature Map For Using Higher Order Neuron (고차 뉴런을 이용한 KOHONEN 자기 조직화 맵의 연결강도 특성)

  • Jung, Jong-Soo;Kim, Sung-Il;Jeon, Byung-Hoon
    • Proceedings of the KIEE Conference
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    • 2003.07d
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    • pp.2516-2518
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    • 2003

  • 본 논문은 고차 뉴런의 문제점으로 지적되고 있는 뉴런이 방대하게 증가하는 문제를 해결하고자, 최적의 뉴런을 생성하고 생성되어진 고차 뉴런 중 일정 비율로 뉴런의 연결강도를 도태시켜 감에 따라 네트워크상에 나타나는 특성을 비교하였다. 본 논문은 고차 뉴런을 이용한 Kohonen의 자기 조직화 맵의 고차 뉴런부에 일정 비율로 연결강도를 도태한 후 인식률을 얻는 형태로 시뮬레이션을 하였다. 특히, 종래 형태의 고차 뉴런을 이용한 Kohonen 자기 조직화 맵의 알고리즘을 변형없이 사용하였으며 중복되는 뉴런을 최대한 억제하기 위해 2차 뉴런만을 생성한 네트워크 구조 위에 입력 데이터의 특징을 유지하고 고차 뉴런의 특징을 더욱 활성화하기 위해 일정한 양의 연결강도를 도태시킴으로써 출력면에서 국소집중 반응에 의한 정확한 인식률 향상 등을 조사하는 시뮬레이션을 하였다. 본 제안 모델의 특성을 살펴보기 위해 60개의 데이터로 이루어진 금속 소나 음데이터와 암석 소나 음 데이터를 이용하여 금속인지 암석인지를 판별하는 시뮬레이션을 하였다.

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Studies of Insecticide Resistance in Green Peach Aphids, Myzus persicae(Sulz) III. Acephate Resistance, Cross-Resistance, and Esterase Isozymes (복숭아혹진딧물의 살충제 저항성(抵抗性)에 관한 연구(硏究) III. Acephate저항성(抵抗性) 발달(發達), 교차저항성(交叉抵抗性) 및 Esterase Isozymes)

  • Choi, Seung-Yoon;Kim, Gil-Hah
    • Korean journal of applied entomology
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    • v.25 no.2 s.67
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    • pp.99-105
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    • 1986

  • The green peach aphids(Myzus persicae) collected in a field had been successively selected by acephate(O, S-dimethyl N-acetyl phosphoroamidothioate) in the laboratory. The selected aphid strain in the 20th generation demonstrated relatively high resistance to acephate as well as relatively high cross-resistance to cypermethrin and oxydemeton-methyl, except pirimicarb. The different esterase isozymes with the strains were detected by the agarose gel electrophoresis and among the isozymes the band of ${\beta}-2$ was only specific for the acephate resistant strains.

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Synergistic Action of Insecticide Mixtures to the Green Peach Aphid(Myzus persicae Sulz.) Resistant to Acephate and Demeton-S-methyl (Acephate, Demeton-S-methyl 저항성계통(抵抗性系統) 복숭아혹진딧물에 대(對)한 살충제간(殺蟲劑間)의 연합독작용(連合毒作用))

  • Choi, S.Y.;Kim, G.H.
    • Korean journal of applied entomology
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    • v.26 no.3 s.72
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    • pp.151-157
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    • 1987

  • The toxicities of binary mixtures of the four insecticides acephate, demeton-S-methyl, cypermethrin and pirimicarb to the two strains of green peach aphid (Myzus persicae Sulz.) resistant to acephate and demeton-S-methyl were investigated and compared to the toxicities of their individual insecticides. The synergistic action of the insecticide mixtures to the insects were greatly varied with the kind of insecticide combinations, their mixture ratios, and the origin of resistance by an insecticide. The maximum synergistic action of acephate for the acephate resistant strain was obtained at 1:1 mixed with demeton-S-methyl. However, there were some antagonistic effects in all acephate mixtures with pirimicarb and cypermethrin. With the strain of demeton-S-methyl resistance, acephate, cypermethrin, and pirimicarb were synergized at the given mixture ratios by demeton-S-methyl. The maximum synergistic effect was observed at 2:3 with acephate, 1:1 with cypermethrin and 3:2 with pirimicarb.

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