생물환경조절학회지 (Journal of Bio-Environment Control)

  • 제21권2호
  • /
  • Pages.114-119
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  • 2012
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  • 1229-4675(pISSN)
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  • 2765-3641(eISSN)
한국생물환경조절학회 (The Korean Society for Bio-Environment Control)
권호 표지

이류체 포그시스템 및 천연물을 이용한 친환경적 가루이 방제

Eco-friendly Control of Whiteflies by Two-Fluid Fogging System with Natural Substances in Greenhouses

  • 투고 : 2012.02.09
  • 심사 : 2012.04.19
  • 발행 : 2012.06.30
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초록

본 연구는 이류체 포그시스템과 천연물을 이용하여 효과적이고 친환경적인 가루이 예방 및 방제 방법을 구명하기 위해 수행되었다. 실험은 단동형 플라스틱하우스에서 공시품종으로 비타미니를 사용하여 총 4회 수행되었다. 1차 실험에서는 별도의 습도조절 없이 이류체 포그시스템을 작동하였다고, 2차 실험에서는 이류체 포그시스템으로 습도를 70% 이상으로 제어하였다. 3차 실험에서는 이류체 포그시스템으로 1.5mg/L Neem Oil을 분무처리하였고, 4차 실험에서는 2mg/L 농도의 Oleic acid를 분무처리하였다. 1차 실험에서 분무처리구의 가루이의 밀도는 크게 감소하였다. 2차 실험에서는 1차 실험보다도 분무효과가 더 크게 조사되었다. 이를 통해 습도를 높게 관리하여 미세수분입자의 양이 많고 또한 오래 공중에 머물게 하는 것이 가루이 방제에 더욱 효과적인 것으로 판단되었다. 3차 및 4차 실험에서 Neem Oil과 Oleic acid의 방제효과는 78%와 76.4%로, 분무만 했을 때의 53%보다 큰 효과를 나타내었다. 따라서 가루이 방제에 화학 살충제 대신에 이류체 포그시스템을 이용하여 두 가지 천연물을 사용하는 것이 매우 좋은 방법이며, 특히 저렴한 Oleic acid를 이용하는 것이 경제적인 것으로 사료된다. 또한 평소에 이류체 포그시스템으로 온도와 습도관리를 하다가, 약제방제시 이류체 포그시스템을 이용하는 것이 악성 노동력 감소, 환경친화성, 생산성 증대 등에 기여하는 방안이 될 것으로 사료된다.

We have conducted 4 experiments to develop the most environmental and effective use of the two-fluid fog system to prevent and exterminate whiteflies in tomato cultivation. In particular, these experiments used Vitamini tomatoes grown in stand-alone greenhouses at Buyeo Tomato Experiment Station as subjects. Each experiment utilized the fog system in a different way. The first experiment provided the control group, which was subject to the two-fluid fog system without additional humidity control. In the second experiment, the two-fluid fog system controlled the humidity level to be above 70%. The third and the fourth experiment utilized natural substances, which were 1.5 mg/L of Neem Oil and 2 mg/L of Oleic acid respectively, without additional humidity control. From the first experiment, we could observe that a simple use of the two-fluid fog system decreased the density of whiteflies in the greenhouses. This impact of the fog system on whiteflies was greater in the second experiment. By comparing the first and the second experiment, we concluded that whiteflies are more effectively prevented by maintaining a higher humidity level via the fog system's smaller water droplets that float in the air for longer time than the standard fog system in rather dry condition. In the third and the fourth experiments, the extermination level was 78% and 76.4% respectively, comparing only 53% in the first experiment without the humidity control. Therefore, using the natural substances in addition to the humidity control increases the extermination effectiveness. Considering the similar results from the 3rd and the 4th experiments, Oleic acid has a greater appeal for its lower price. Using the two-fluid fog system to both control the humidity on a daily basis and spray the substances for occasional extermination would reduce labor cost and increase production in an environmental way.

키워드

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