• Title/Summary/Keyword: insecticides.

검색결과 579건 처리시간 0.021초

포장에서 복숭아혹진딧물(Myzus persicae Sulzer)의 계절적 변동에 따른 약제 감수성 (Seasonal fluctuation of susceptibility of the green peach aphid to insecticides in Chinese cabbage field)

  • 송승석
    • 한국응용곤충학회지
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    • 제32권2호
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    • pp.218-221
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    • 1993
  • 복숭아혹진딧물 방제용약제를 공시하여 1983년부터 4년에 걸쳐 포장에서의 약효와 실내에서 약제감수성을 조사하였다. 마라치온을 포함한 7종의 살충제의 방제가가 현저히 낮았다. 또한 포장에서 계절별로 발생한 개체군에 대한 각 약제의 감수성시험을 실시한 결과 약제에 따라 1~167배의 약제 감수성 차이를 보였다.

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안전한 한약재(잔대, 만삼) 재배를 위한 유용미생물 이용에 관한 연구 (The research for the utilization of useful microorganism for the culture of harmless medicinal herbs (Adenophora triphylla, Codonopsis pilosula))

  • 김재근
    • 환경위생공학
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    • 제21권2호
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    • pp.1-10
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    • 2006
  • Codonopsis pilosula and Adenophora triphylla were cultivated by sawing seeds, but the germination rate were low. To cultivate these two wild plants was very difficult. The marketable roots of the plants had low quality. The plant pathogens were very difficulty to prevent the diseases (Rhizoctonia, Pythium, Fusarium, Erwinia, Botrytis, Phythophthora) appeared in cultural state. For the extermination of the disease needs a lot of agricultural chemicals, the effect of remain behind an insecticides was high of a hazardous rate after harvest. On this studies, for the safe prevention of the diseases and the promote of seeds germination, we used Bacillus subtilis, B. liquefaciens, Paenibacillus polymixa, Pseudomonas putida separated in our research, these results would bring us harmless products of medicinal herbs for human.

Static Test에 의한 Daphnia magna의 환경오염물질에 대한 민감성 평가 (Sensitivity of Daphnia magna to the Toxic Materials by the static Test)

  • 한의정;최성헌;김진일
    • 환경위생공학
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    • 제9권2호
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    • pp.101-109
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    • 1994
  • Acute toxicity of heavy metals( mercury, cadmium lead, chromium and copper ), organophosphours insecticides( EPN, 2, 4- D, and parathion ), and other chemicals( arsenic, cyanide, and phenol ) to Daphnia magna was analyzed. Acute toxicity of heavy metals, organophosphours insecticides and other chemicals on Daphnia magna, LC$_{50}$ was showed 0.07-0.73mg/1, 0.22-1.94mg/t and 1.73-39.92mg/1 respectively. Daphnia magna to most of toxic chemicals was sensitive and then it seems to be useful except phenol in toxic test of water. Toxic chemicals were classified as Group 1 which had a high LC$_{50}$ value and the low increase rate of toxicity according to the increase of concentration, Group 2 which had a high LC$_{50}$ value and the high increase rate of toxicity, Group 3 which had a low LC$_{50}$ value and the low increase rate of toxicity. To Daphnia magna, lead, chromium, EPN, and parathion were included in Group 1; Mercury and copper in Group 2; Arsenic and cadmium in Group 3; Cyanide 2,4- D, and phenol in Group 4.

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토양 세척을 통한 살충제 (파라티온, 다이아지논)로 오염된 토양의 정화 (Remediation of Insecticides (Parathion, Diazinon) Contaminated Soil by Washing Process)

  • 현재혁;백정선;조미영
    • 한국지하수토양환경학회:학술대회논문집
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    • 한국지하수토양환경학회 1999년도 추계학술발표회
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    • pp.3-6
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    • 1999
  • Several chemical washing procedures were applied to Parathion and Diazinon contaminated soil. Batch and column tests were performed to determine the insecticides extraction efficiency as a function of pH. Washing efficiency of methanol is more higher than that of water and HCl when washed parathion and diazinon are. Those are completely miscible with most organic solvents. For parathion, release trend is increased as pH is increased because it is hydrolyzed easily at the condition of alkali. But diazinon shows reverse because diazinon is decomposed rapidly at the condition of acidic So, diazinon is more released than parathion is because this experiment is peformed in acidic and weak acidic conditions. Generally, parathion and diazinon are classified as having low mobility, so they can be easily controlled if the proper washing process are applied.

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Compatibility of Entomopathogenic fungus Lecanicillium attenuatum and Pesticides to control Cotton Aphid, Aphis gossypii

  • Kim, Jeong-Jun;Kim, Kyu-Chin
    • International Journal of Industrial Entomology and Biomaterials
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    • 제14권2호
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    • pp.143-146
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    • 2007
  • Concerns of entomopathogenic fungi as alternative pest control agents are increasing even though chemical pesticides have been used as the main control agents for pests and diseases in crop production. This study was conducted to test the influence of fungicides and insecticides on an isolate of Lecanicillium attenuatum that was reported to have the pathogenicity against cotton aphid, because fungicides and/or insecticides can apply with mycopesticides simultaneous, before and/or after. Fungicides fenbuconazole+thiram and propineb inhibited the spore germination and mycelial growth of L. attenuatum CS625; dimethomorph and procymidone did not affect spore germination or mycelial growth. The insecticide abamectin, deltamethrin, imidachropride, and spinosad had no detrimental effects on spore germination or mycelial growth. Therefore, these results demonstrated that careful selection of pesticides and fungicides can be applied to the integrated pest and disease control with microbial pesticide.

MODELLING AFRICAN TRYPANOSOMIASIS IN HUMAN WITH OPTIMAL CONTROL AND COST-EFFECTIVENESS ANALYSIS

  • GERVAS, HAMENYIMANA EMANUEL;HUGO, ALFRED K.
    • Journal of applied mathematics & informatics
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    • 제39권5_6호
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    • pp.895-918
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    • 2021
  • Human African Trypanosomiasis (HAT) also known as sleeping sickness, is a neglected tropical vector borne disease caused by trypanosome protozoa transmitted by bites of infected tsetse fly. The basic reproduction number, R0 derived using the next generation matrix method which shows that the disease persists in the population if the value of R0 > 1. The numerical simulations of optimal control model carried out to determine the control strategy that can combat HAT under the minimum cost. The results indicate that, the use of both education campaign, treatment and insecticides are more efficient and effective to eliminate HAT in African community but too costly. Furthermore, the cost-effectiveness of the control measures (education campaign, treatment and insecticides) were determined using incremental cost-effectiveness ratio (ICER) approach and the results show that, the use of education and treatment of infected people as the best cost effective strategy compared to other strategies.