• Journal of Bio-Environment Control
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• v.7 no.4
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• pp.276-282
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• 1998

This experiment was carried out to elucidate the effect of ethychlozate foliar application on the fruit quality of Miyagawa Early Satsuma Mandarin in the plastic house. Ethychlozate(100mg.L$^{-1}$ ) was applied to the fruit at 100, 115 and 145 days after full bloom stage. The fruit was divided into four frequency level groups, with the control group receiving no Ethychlozate treatment and the level 3 group receiving all three applications. Peel coloration by a value Increased as application frequency increased. The a/b value trend was seen to be similar to this, but the b value ran contrary to the a value trend. Glucose contents of the fruit juice did not differ statistically among the application frequency levels but the fructose level was seen to be higher with increasing application frequency. Sucrose showed a similar trend to fructose in that it had a tendency to increase as application frequency increased. As a result of this, total sugar increased naturally with application frequency. The average Brix level among all treatment groups was higher than the average Brix level in the control group but Brix level did not differ significantly among application frequency levels. Acidity had a tendency to increase as application frequency increase, but there was no statistical difference found.

• Journal of Bio-Environment Control
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• v.10 no.2
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• pp.111-117
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• 2001

This experiment was conducted to elucidate the effects of foliar application of monopotassium phosphate on the acceleration of ind color and fruit quality of Satsuma mandarin cultivated in the plastic greenhouse. The 'a'value of peel chromaticity increased seasonably with the increasing frequency of foliar application of monopotassium phosphate, but became gradually irresponsive as the fruit approached to harvesting time. Glucose content increased with the number of foliar applications so did the fructose content. Content of reducing sugars tended to increase with the number of foliar applications by 0.32 to 0.41%.mL$^{-1}$ juice in treatment sof ive or more applications. Sucrose content increased gradually with the increasing number of foliar applications, but there was no significatn difference among treatments. Total sugar also increased with the increasing number of foliar applications Generally, the soluble solid level is considered to be representative of fruit quality. Sugar content increased with the number of foliar application up to 5 times in which sugar content increased by 0.93$^{\circ}$Bx as compared to the control. The fruit acidity of the treatment plots decreased as compared to that of the control, but there was no significant difference in fruit acidity among foliar application times.

• Proceedings of the Korean Environmental Sciences Society Conference
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• 2002.05b
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• pp.168-172
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• 2002

돈분뇨를 토양에 살포시 경과일에 따른 이온들의 용탈 특성을 살펴보기 위해 질산성 질소 농도가 높고, 양돈사육두수가 많은 서ㆍ북부 지역의 토양에 돈분뇨를 살포, 비살포시 1~32일 경과 후에 일정량의 강수(100mm)시 용탈되는 각종 이온의 용탈 정도를 검토한 결과 다음과 같은 결론을 얻었다. 토양에 134kg T-N/ha로 살포시 질사성질소는 1.18mg/L.day의 질산화가 이루어졌고, 37kg $Cl^{-}$/ha로 살포한 염소이온의 용탈율은 1일에서 4일까지는 1.0mg/L.day로 증가하다가, 그 후 0.2mg/L.day로 용탈속도가 1/5로 감소하였다. 그러나 대조구는 질산성 질소, 염소이온 모두 거의 변화가 없었다.

• 농업기술회보
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• v.51 no.5
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• pp.19-20
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• 2014

농업인들이 병해충을 방제하기 위해 농약을 살포하는 과정에서 농약이 손이나 피부에 묻거나 호흡을 통해 마시게 된다. 최근 농작업 중 농약을 살포하는 농업인에 대한 건강이 주요 관심사가 되고 있다. 농약으로부터 농업인의 건강을 보호하기 위한 제도와 앞으로 해야 할 일이 무엇인지를 알아보고자 한다.

• Life and Agrochemicals
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• s.258
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• pp.38-40
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• 2010

서로 다른 계통의 살충제 교호살포를 추천한다. 그 이유로는 한 개체군내에서 저항성이 일반적으로 일정하게 발현되는 것이 아니기 때문에 다른 계통의 살충제를 교호살포하여 예견된 저항성을 사전에 효과적으로 지연 또는 방지하는데 그 목적이 있다.

• Agrochemical news magazine
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• v.24 no.3 s.186
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• pp.10-13
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• 2003

• Journal of Animal Environmental Science
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• v.14 no.2
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• pp.97-104
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• 2008

Appropriate air quality in the pig building is essential to prevent farmers' health as well as to increase pig performance. This on-site experiment was conducted to assess dust reduction efficiencies of several liquid additives with spaying method in the enclosed pig building. The mean reduction rate of total dust only after spray was approximately 30% for all the treatments compared to initial level before spraying additives, which was found to reduce the initial level of total dust significantly (p<0.05). The mean reduction rate of all the treatments at 1hr after spray was about 24% which was 6% lower than only after spray. Since 3hr after spray, however, total dust level were fluctuated variably for all the treatments besides application of the soybean oil. Based on this result, effect of soybean oil on dust reduction in the enclosed pig building was most prominent among liquid additives evaluated in terms of efficiency and duration.

• Korean journal of applied entomology
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• v.29 no.4
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• pp.252-256
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• 1990

Viral insecticides were formulated with Spodoptera litura nuclear polyhedrosis virus and different U.V. protectants based on white carbon, molasses, and white carbon and molasses mixture to use as microbial control agents. Effect of rainfall on the attachment of formulated viruses to leaves was no different between the treated and the non-treated experiment. Persistence of the formulations was lated 5 days on the surface-sprayed leaves and 12 days on the under-sprayed leaves which was showing 60% mortality. Total mortality of the viral insecticides was more than 97% with no differences among them. Field evaluation of three viral insecticides in soybean field was very successful then carried out in Chinju, a southern part of Korea. Mortality by the formulation in the field during 14 days was more than 93%, but the formulations contained molasses showed phytotoxicity on soybean leaves. Spray effect of the viral insecticides was begun to appear from 7 days later than that of chemical insecticide.

• Journal of Animal Environmental Science
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• v.17 no.1
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• pp.23-32
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• 2011

The purpose of this study is development of the sprayer that can effectively control pathogens. Image processing was used to analyze the sprayer. Experimental paper in the form of $5{\times}7$ 10 m intervals total of 35 sheets were installed. Experiment used binarized image data obtained by sprayed pigment, to analysis spray volume and distance. The experimental results show that 60 m distance was available to the spray. And spray rate was high up to 30 m. It can be used in livestock farms are expected.

• Korean Journal of Environmental Agriculture
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• v.16 no.4
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• pp.373-381
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• 1997

In order to investigate the drift of pesticides sprayed on Chinese cabbage, 7 pesticides chlorpyrifos, EPN, pirimiphos-methyl, phenthoate, tetradifon, dicofol and bifenthrin were applied in two sets of field tests. The pesticide residues were quantified bar multiple-residue analysis, in which the recovery rate was 78${\sim}$92% and standard deviation was ${\pm}0.683{\sim}52%$. It was found that most of the tested pesticides were spread by drift to neighbouring area and brought about the contamination of the unsprayed crops. The extent of drift varied depending upon the pesticide, distance and wind direction. The mean residue levels on unsprayed crops were 0.66% at 3 meter distance, 0.10% at 6 m distance and 0.05% at 9 m distance from the applied area and the maximum level was 1.83% of the residue on sprayed crops.