• Title/Summary/Keyword: 충해

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DDT 해설

  • 김영은
    • YAKHAK HOEJI
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    • v.1 no.1
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    • pp.14-15
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    • 1948
  • 해방후 진주한 미군에 의하여 신살충제로 등장한 것이 DDT였으며 그후 널리 물것 방지에 쓰이고 있는 터이나 그 사용방법에 있어 분명치 못한 점도 적지아니 할뿐 아니라 장차농업 방면충해에 대한 살충제로서의 가치가 매우 주목되는 바이므로 외국잡지에 기재된 것을 택하여 간단히 소개하고자 한다.

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Damage to the Wooden Cultural Properties by Nicobium castaneum (Coleoptera: Anobiidae) (Nicobium castaneum (딱정벌레目: 빗살수염벌레과(科))에 의한 목제 문화재의 충해)

  • Oh, Joon-Suk;Jeong, Jong-Chel
    • Journal of Conservation Science
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    • v.25 no.3
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    • pp.317-322
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    • 2009
  • Nicobium castaneum belonging to the family Anobiidae of Coleoptera was found in Jeju Folk Museum in 2006, Miribeol Folk Museum in 2007, and a bier preserved in the bier house of Jeju in 2008. We found that this species did considerable damage to the several wooden cultural properties. For Identification and pest management to conserve wooden cultural properties from this anobiid species, we report morphology of adult and damage pattern (shape of exit holes from the host, tunnels and their excrements etc).

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해외농업-농가가 실험한 석회의 방제효과

  • Park, Seong-Jin
    • 농업기술회보
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    • v.45 no.4
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    • pp.32-35
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    • 2008
  • 최근 일본에서는 시중에 판매되는 농약에 비해 값이 저렴한 석회를 이용하여 작물의 생육에 꼭 필요한 칼슘성분을 적극적으로 사용함으로서 작물의 면역력을 높여 병.충해를 예방, 방제하는 방법을 실천하는 농가가 늘고 있다. 주로 고토석회와 소석회를 덧거름으로 사용하는 경우가 많고, 석회가루를 직접 작물의 잎에 뿌리거나 물에 녹인 후 희석하여 뿌려주고 있다. 한편 굴 껍질이나 계란껍질을 현미식초나 목초액 등에 녹여서 뿌려주는 농가도 있다. 이런 농가 100명의 목소리를 설문 조사한 결과와 사례를 소개한다.

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A New Cultivar of Gypsophila paniculata with Powdery Mildew Resistance and Double Florets of Pink Color, 'Dream Pink' (흰가루병에 강한 분홍색 절화용 안개꽃 '드림핑크' 육성)

  • Cheong, Dong-Chun;Lim, Hoi-Chun;Choi, Chang-Hak;Song, Young-Ju;Kim, Jeong-Man
    • Horticultural Science & Technology
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    • v.29 no.5
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    • pp.500-502
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    • 2011
  • 'Dream Pink', a cultivar of Gypsophila paniculata was newly developed for cut flowers by Jeollabuk-do Agricultural Research & Extension Services. It has morphological characteristics of the intermediate plant type, double florets with many petal and two pistils, emarginate petal tip and campanulate calyx shape. Also 'Dream Pink' had several other traits such as strong flower stalk, deep pink flower color, resistance to powdery mildew and pest injury. Furthermore, 'Dream Pink' produced higher number of nodes, primary branches, longer flower stalk length with long intermodal length. In subalpine area, 'Dream Pink' cultivar showed narrow branching angle as compare to 'My Pink', during the summer cultivation. Blooming in 'Dream Pink' was delayed by 5 days, its florets were broader with more number of petals as compare to 'My Pink'.

Quantitative Analysis for Termites Damage of Wooden Heritage using Ultrasonic Pulse Velocity (초음파 전파속도법을 이용한 목조 문화유산 흰개미 피해의 정량 평가)

  • Ahn, Jae-Cheol
    • Journal of architectural history
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    • v.24 no.5
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    • pp.41-48
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    • 2015
  • Quantitative analysis of termites damage is important in terms of conservation and maintenance of wooden cultural heritage buildings, because termites makes cavities and decreases the section area of wooden structural members. The purpose of this study is to forecast the range and spread of termites damage in the wooden structural members by using ultrasonic pulse velocity method. Ultrasonic pulse velocity has been used as one of non-destructive test to analysis the internal defect by using difference velocity between medium material and cavity. This method would be effective to analysis termites damages. From the result of the ultrasonic velocity test, the loss rate of area effected by termites damage had a strong correlation with ultrasonic velocity. And it is possible to predict the loss rate of area from by termites damage by using regression equation in the case of structural member of fine tree.

Instance Segmentation Based Tomato Pests Disease Detection for Feasibility Evaluation (인스턴스 세그멘테이션 기반 토마토 병충해 탐지 모델 구현 및 적용성 평가)

  • Kim, Eunkyeoung;Park, Junyong;Moon, Yong-Hyuk
    • Proceedings of the Korea Information Processing Society Conference
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    • 2022.05a
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    • pp.417-419
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    • 2022
  • 농축업에 ICT 기술을 접목한 스마트 팜은 생육환경을 자동으로 조절하여 노동력 등을 줄이고도 생산성과 품질을 향상시키는 것이 큰 장점이다. 하지만, 수익으로 이어지는 출하량과 품질 유지를 위해서 병충해에 주의를 기울여야 함은 여전하다. 따라서 토마토 잎 병충해 발생 시, 적절한 대응을 통해 더 큰 피해를 막을 수 있으므로, 초기 증상을 포착하는 기법을 개발한다. 오픈 데이터 셋인 Ai hub 의 시설작물 질병 데이터셋과 추가로 확보한 샘플을 포함해 2 개의 충해, 4 개의 병해에 1,231 장으로 데이터셋을 직접 구성해서 학습했다. 객체 탐지와 세그먼테이션이 동시에 가능하며 작은 병변도 잘 탐지하는 모델을 사용해서 총 6 가지 병충해에 대한 뚜렷한 증상 탐지를 보여주었다.

Effects of Aectic Acid-Water Solvents on the Organic Acid pulping of Wood (아세트산(酸)-물 용매계(溶媒系)에 의한 목재(木材)의 유기산(有機酸) 증해효과(蒸解效果))

  • Lee, Sun-Ho;Jo, Byoung-Muk
    • Journal of Forest and Environmental Science
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    • v.9 no.1
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    • pp.67-80
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    • 1993
  • There are a lot of serious problums associated with conventional pulping processes, such as kraft and sulfite. In order to tackle these difficulties, organic acid pulping of Populus tomentiglandulosa T. Lee and Pinus densiflora S. et Z. have been investigated as on alternative method. The acetic acid cooking of Populus tomentiglandulosa T. Lee achieved good delignification with pulp yields of 55-65% under almost all cooking conditions. In the acetic acid cooking of Pinus densiflora S. et Z., it was not cooked at a low temperature. The strength properties of the acetic acid pulps from Pinus tomentiglandulosa T. Lee showed the optimum with 95% acetic acid concentration at $185^{\circ}C$ maximum cooking temperature for 0.5hr cooking time. The strength properties of the acetic acid pulps from Pinus densiflora S. et Z. displayed excellent tear strength in comparison with those of the other softwoods. In the process of acetic acid cooking, glucose has been removed a little, but other sugars have been eliminated. The elemental compositions and $C_9$ formulas of acetosolv lignins from Populus tomentiglandulosa T. Lee were 63.88% carbon, 5.45% hydrogen and 30.67% oxygen and $C_9H_{9.15}O_{3.24}$ The elemental compositions and $C_9$ formulas of acetosolv lignins from Pinus densiflora S. et Z. were 61.85% carbon, 6.14% hydrogen and 32.01% oxygen and $C_9H_{9.15}O_{3.50}$ The Wt. av. MWT's of the acetosolv lignins from Pinus tomentiglandulosa T. Lee and Pinus densiflora S. et Z. were 731 and 725.

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