• The Korean Journal of Pesticide Science
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• v.21 no.1
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• pp.9-16
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• 2017

A survey was conducted to research on planting system and pesticide spray methods including spray volume, sprayer types, and spray nozzles used in apple orchards. The survey was deployed to 395 farmers in 17 cities and towns including 7 regions which are major producers of apple via interview. Major apple varieties were Fuji (79.2%) and Hongro (50.9%) and high density planting system was mainly used in apple orchards (distance between rows: 4.0-4.5 m (73.1%); planting distance: 1.5-3.5 m (88.6%); canopy height: 3.0-4.5 m (88.2%)). The percentages of sprayer types were 77.6% and 22.1% for speed sprayer (airblast sprayer) and power sprayer, respectively. Spray volumes per 10a were 250-300 L in April, the month of spraying the lowest volume, and 300-400 L in June-August, the months of spraying the highest volume. Significant difference in spray volumes were not observed between conventional planting and high density planting, but regional spray volume showed significant difference. The main nozzles used by apple farmers using power sprayers were super jet nozzle (45%), super wide nozzle (26%), and 2-3 vertical head nozzle (25%). The results will helpful to establish practical agrochemicals management policy including suggestion of pesticide spray volume and evaluation of pesticide residue data and efficacy data.

• Journal of Animal Environmental Science
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• v.13 no.2
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• pp.105-112
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• 2007

This research was carried out to test and analyse the capability of a fan for development of a sprayer in actual livestock farm. A fan was designed and made to be able to spray agricultural chemicals within 140mm in a maximum scattering range and 100m in an effective scattering range. Accordingly, its' flow rate was $3,600\;m^3/min$, and static pressure was 100 mmAq for a wide area sprayer to be sprayed widely and far. Fan performance, which was given $600\;m^3/min$ flow rate and 500 mmAq total pressure, was tested fur basic experiment. As the result, the axial power showed minimum error, which be designed to keep the fan performance. And power efficiency was the maximum. Sound level was 92.1dB that wasn't enough to environmental standard. If we take the sealed place into consideration, sound level is suitable for environmental standard.

• The Korean Journal of Pesticide Science
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• v.20 no.1
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• pp.1-6
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• 2016

In order to obtain efficient control effect of the pesticide, it is important to ensure uniform adhesion to the desired plant parts at the right time. Pesticide spray method (application technology) is an important factor affecting the efficacy and crops persistent expression. The aim of this study was to develop an efficient system to investigate the coating weight distribution of citrus leaves due to the difference between the nozzle and spray sprinkler system using dithianon used in citrus scab. Other An, engine type sprayer was used as the control. Speed sprayer and different sprinklers were wsed to way the deposit amounts of dithianon on citrus leaves. The test was conducted at the National Institute of Horticultural Herbal Science Citrus Research Station, located in the circle citrus Jeju Island. In order to examine whether the citrus orchard spray and the evenl on the whole, dithianon (43% flowable 1000-fold dilution) was sprayed, filter paper and leaves were analyzed by the height as top, middle, bottom. Speed sprayer the was most effective on depositing at the middle position, of the leaves. All other sprays the leaces except the dry mist sprinkler were not effective enough to deposit on the back sides. To achieve more deposits on the high position leaves, an improve ment in the nozzle and an efficient power system of sprayer were needed.

• Journal of agricultural medicine and community health
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• v.29 no.2
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• pp.249-263
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• 2004

Objectives: The objectives of the present study were to establish the exposure monitoring method of chlorpyrifos and chlorothalonil application to pear and field red pepper by vehicle-mounted sprayer, hand-held sprayer and to assess the risk. Methods and Results: Chlorpyrifos met all of requirements of sampling and analysis method(U.S. EPA), but chlorothalonil met only dermal patch method. Potential dermal and inhalation exposure was evaluated in 42 farmers. Compared with the hand-held sprayer application, vehicle mounted sprayer demonstrated producing relatively lower dermal exposure levels with statistical significance. In dermal exposure during hand-held application, there is no significant difference between pear and red pepper. Conclusions: This results show that application method is the main factor of dermal exposure. There was no statistically significant difference between each group of respiratory exposure level. The margin of safety (MOS) was calculated to assess the risk of pesticide exposure. All Chlorpyrifos MOS values are lower than 0.2, which mean working conditions are unsafe. In order to protect farmers, big efforts to control exposure are needed.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• v.11 no.2
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• pp.237-240
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• 2006

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• v.11 no.1
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• pp.75-81
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• 2006

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.10a
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• pp.167-168
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• 2009

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2009.10a
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• pp.333-334
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• 2009

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2017.04a
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• pp.5-5
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• 2017

방제 작업은 병해충을 줄여 농산물의 품질과 생산량을 높이기 위한 필수 작업이다. 하지만 방제 작업은 고온 다습한 환경에서 작업하여 고된 작업 강도와 농민의 농약 중독 문제, 고령화 여성화로 인한 농가 일손 부족 문제로 농촌에서는 기피하고 있는 작업 중 하나이다. 이러한 점을 보완하기 위해 동력 살포기와 같은 기계를 이용하여 살포 작업을 실시하고 있으며, 스피드 스프레이어의 경우 2015년 기준 2,073 대가 농가에 공급되어졌다. 스피드 스프레이어를 사용하는 농가는 점차 증가하고 있으나, 현재 스피드 스프레이어의 살포 방식의 경우 농약을 다량 살포함으로써, 농약의 낭비, 환경오염의 문제점이 나타나고 있다. 이러한 점을 보완하기 위해 최근에는 방제 작업의 방식이 붐을 이용한 방제 작업으로 바뀌어가고 있는 추세이다. 붐 방제기의 경우 붐에 노즐을 배치하여 작물에 근접한 위치에서 농약을 정밀 살포하며, 스피드 스프레이어와 다르게 농약의 낭비를 줄일 수 있으며, 농약의 살포량을 제어하기 쉬운 장점이 있다. 본 연구에서는 기존의 트랙터 부착형 붐 방제기가 아닌 스피드 스프레이어를 개선한 붐식 스피드 스프레이어를 개발하기 위하여 현재 사용되고 있는 붐 방제기의 연구 동향 및 제품을 소개하고 개발에 필요한 기초 자료로 활용하고자 한다. 기존의 붐 방제기는 트랙터에 부착하는 형태로 개발되어졌으며 트랙터의 부착위치에 따라 전륜, 후륜형으로 나뉘고, 작물의 크기에 따라서 붐의 높이 및 붐의 각도를 조절하는 구조로 제작하여 사용되고 있다.

• Journal of Advanced Navigation Technology
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• v.15 no.1
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• pp.91-96
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• 2011

In this paper, we design and implement a automatic control system of wireless sensor network based sprayer for hog barns. The proposed control system is driven by events from sensor nodes. It gathers various sensor readings such as temperature, humid, water level and water temperature, and controls the sprayer in real time by analyzing the sensor readings. Through experiments, we show that the proposed control system manages temperature and humidity steadily. Our proposed system enhances the existing system about 33% for temperature management and 37.3% for humidity management.