• Title/Summary/Keyword: 가열연막

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Evaluations of Thermal Fog for Domestic Mosquito Vector Control (국내 주요 모기에 대한 가열연막의 방제효과)

  • Jeong, Su-Yule;Min, Young-Hwan;Jung, Sun Ho;Kang, Gi-Seok;Jeong, Hyo-Bin;Lee, Dong-Kyu
    • Korean journal of applied entomology
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    • v.61 no.1
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    • pp.267-274
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    • 2022
  • Portable and vehicle thermal fogs were tested using etofenprox, bifenthrin, and deltamethrin diluted with diesel oil, kerosene, and water against domestic vector mosquitoes, Aedes albopictus, Anopheles sinensis s.l., Culex pipiens, and Culex tritaeniorhynchus. The female mosquitoes were confined in small cages suspended on poles at progressively greater distances from the fog release point at an open field. The average mortality rates of four vector mosquitoes to the three insecticides were 52.0% and 64.0% at a portable thermal fogs diluted with diesel oil and water within a 10 m distance, respectively. A vehicle thermal fog had a mean mortality of 34.8% of the females to the insecticides diluted with diesel oil within 50 m. The mortality rates were not significantly different among all the tested distances. At a dilution solvent test, the mortality of the females to the insecticides diluted with kerosene was 1.9 times higher than that of diesel oil.

Studies on the Susceptibility of Insecticides and Killing Effect by Thermal Fogging Against Culex pipiens pallens of Ansan Strain (안산시 서식 빨간집모기(Culex pipiens pallens)에 대한 살충제 감수성 및 가열연막 효과에 관한 연구)

  • Choi Han-Young
    • Journal of environmental and Sanitary engineering
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    • v.20 no.3 s.57
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    • pp.44-50
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    • 2005
  • Studies on the insecticides susceptibility of adults females Culex pipiens pallens were carried out in 2003. The pupae were emerged originated wild-caught larvae in Ansan city, Korea. The test methods employed, using 7 organophosphorous insecticides, four synthetic pyrethroides, and fipronil penyrazole were evaluated. The following results were obtained 1. Fipronil has showed the most strong value in $LD_{50}\;0.00075{\mu}g/female$, out of 12 kind of insecticides, and followed by deltamethrin 0.0071, $\delta-cyhalothrin\;0.008$, profenofos 0.0082 and $\beta-cyfluthrin$ 0.0088, respectively 2. The killing effect of lambdacyhalothrin and profenophos against adult females Culex pipiens pallens was examined using thermal fogging. The mortality rate were lambdacyhalothrin $41.1\%$ and profenophos $50.7\%$, respectively. The killing effect of thermal fogging was highly effectiveness to distance 6m from nozzle

Direct Bonding of SiN/SiO Silicon wafer pairs (직접접합 질화규소/산화규소절연막 이종실리콘기판쌍의 제조)

  • 이상현;서태윤;송오성
    • Proceedings of the KAIS Fall Conference
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    • 2001.11a
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    • pp.169-172
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    • 2001
  • 다층 MEMS구조의 기초기판쌍 소재로 쓰일 수 있는 Si∥SiO₂/Si₃N₄∥Si 기판쌍의 직접접합 가능성을 확인하기 위해서 2000Å-SiO₂와 500Å-Si₃N₄층을 가진 직경 10cm의 실리콘 기판을 각각 친수성 및 소수성 표면세척을 하고 청정분위기에서 경면끼리 가접을 실시하였다. 가접된 기판쌍을 통상의 박스형 전기로를 이용하여 400, 600, 800, 1000, 1200℃ 범위에서 2시간 동안 가열하여 접합을 완료하였다. 완성된 기판쌍을 적외선분석기를 이용하여 접합면적을 확인하였고, 면도칼 삽입법으로 접합계면에너지를 측정하였다. 실험온도 범위 내에서 Si∥SiO₂/Si₃N₄∥Si 기판쌍은 1000℃ 이상에서 접합계면에너지는 2,344mJ/㎡을 나타냈으며, 이는 기존의 Si/Si의 동종접합기판쌍과 동등한 수준의 접합강도로서 부가가치가 큰 새로운 조합의 기판쌍 제조가 가능하였다.

Environment-Friendly Control of Cucumber Downy Mildew Using Chlorine Dioxide (이산화염소수를 활용한 오이 노균병 친환경방제)

  • Kim, Byung-Ryun;Hahm, Soo-Sang;Kwon, Mi-Kyung;Kim, Yun-Jeong;Kim, Woon-Seop;Song, Jeong-Young;Oh, Sang-Keun;Ju, Jung-Il
    • Research in Plant Disease
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    • v.27 no.4
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    • pp.149-154
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    • 2021
  • Pseudoperonospora cubensis (downy mildew) is highly virulent to various Cucurbitaceae crops, including cucumber (Cucumis sativus). We tested chlorine dioxide application in a plastic greenhouse for environment-friendly control of downy mildew disease. Spraying diluted chlorine dioxide suppressed downy mildew disease with 41.2% control efficacy. Thermal fogging with chlorine dioxide had a high control efficacy of 80.9%, confirming that this approach is useful for environment-friendly downy mildew control. Using thermal fogging to control diseases that are greatly affected by humidity, such as downy mildew, may be more effective compared with conventional dilution spray control methods.

Seasonal Prevalence and Integrated Control Method of Insect Pests in the Dredged Soil Dumping Area in Masan, Korea (마산시 준설토 투기장에서 발생하는 유해곤충의 계절적 발생 소장과 통합적 저감방법)

  • Kim, Yong-Ki;Lee, Cheol-Min;Bae, Yang-Seop
    • Journal of Wetlands Research
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    • v.14 no.4
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    • pp.687-698
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    • 2012
  • This study was conducted to monitor and prevent outbreak of insect pestsin dredged soil dumping area after completion of dredging construction in Masan City. Monitoring was carried out using tent trap, colored sticky trap, and CDC light trap. A total of 217,073 individuals belonging to 23 species from 10 families in 3 orders were collected. In overwintering survey using tent trap, 3 species were collected. 2 species (Leptocera fuscipennis (Haliday) and Ephydra japonica Miyagi) of them were outbreak species. In color sticky trap, more than 96% of total individuals were comprised of five species: Urolepis maritima Walker (43%), E. japonica (19%), Fucellia sp. 1 (13%), Philotelma sp. 1 (10%), and Homalometopus sp. 1 (9%). In CDC light trap, three dominant species were Homalometopus sp. 1 (91%), Glyptotendipes tokunagai Sasa (6%), and L. fuscipennis (1%), representing about 98% of the total. To prevent damage caused by outbreak of insect pests, we carried out ecological control methods such as covering the fresh soil in outbreak area, using light trap, pumping up water and so on, minimizing use of thermal fogging and insect growth regulatorwhen the insect pest population was rapidly increasing.