• Title, Summary, Keyword: Pesticide

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Change of the Protection Efficiency in Each Part of Developed Pesticide-Proof Clothes by Repeated Washings (개발 과수용 농약방제복의 반복세탁에 따른 부위별 농약 방호성능의 변화)

  • Shin, Jeoung-Hwa;Hwang, Kyoung-Sook;Lee, Hyo-Hyeon
    • The Korean Journal of Community Living Science
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    • v.22 no.4
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    • pp.615-621
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    • 2011
  • This study was conducted to evaluate of the protection efficiency in each part of developed pesticide-proof clothes by repeated washings. We investigated the effect of repeated laundering on mechanical properties of pesticide-proof clothes (not washed vs 5 times washed). We also examined pesticide infiltration rate into the pesticide-proof clothes by repeated laundering. The patches(TCL paper, surface area 50cm2)were attached to the inside of pesticide-proof clothes(head, chest, right upper-arm, right forearm, left thigh, left calf, back) which subjects had dressed in during pesticide spraying. The patches were detached from working clothes after work. For the extraction of pesticide in pesticide-proof clothes, sonication was applied for 30 min with methanol. The gas chromatography/mass spectrometry (GC/MS) was applied to identify the pesticide component. The results of this study are as follows: The force strength, water-vapour resistance and surface wetting resistance of pesticide-proof clothes decreased 5 times more in washed clothes. The concentration of pesticide was the highest in the head area of pesticide-proof clothes. In seven parts of TLC paper attached to the pesticide proof clothes, the concentration of pesticide was higher in the left thigh. The penetration part and concentration of pesticide increased as washing was repeated. Therefore the conclusion which can be drawn from this study is this: protection efficiency of pesticide-proof clothes decrease by repeated washings.

Survey on Pesticide Residues in Commercial Agricultural Products in the Northern Area of Seoul(2008) (서울특별시 강북지역 유통 농산물 중 농약잔류실태조사(2008))

  • Seung, Hyun-Jung;Park, Sung-Kyu;Ha, Kwang-Tae;Kim, Ouk-Hee;Choi, Young-Hee;Kim, Si-Jung;Lee, Kyeong-Ah;Jang, Jung-Im;Jo, Han-Bin;Choi, Byung-Hyun
    • Journal of Food Hygiene and Safety
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    • v.24 no.4
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    • pp.357-367
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    • 2009
  • This study was carried out to investigate the current status of pesticide residues in 3,735 agricultural products in the northern area of Seoul from January to December in 2008. 3,735 samples, comprising 119 types of agricultrural products were assessed via a multiresidue method to detect 260 pesticides. Pesticide residues were detected in 19.7% (737 of 3,735 samples), and the rate at which the detected residues violated the maximum residue levels(MRLs) of the Korean Food Code was 3.2% (121 of 3,735 samples). Pesticide residues were detected in 72 spin-aches, 64 peppers, 45 sweet peppers, 40 perilla leaves, 38 korean cabbages and 37 dried agricultural products. The samples that violated the MRLs included 14 perilla leaves, 13 spinaches, 12 leek, 6 lettuces(leaf), 6 chards and 6 gyeojchaes. Procymidone, endosulfan, chlorfenapyr, cypermethrin, bifenthrin, tebuconazole and fenvalerate were all frequently observed. Procymidone, endosulfan, dimethomorph and diniconazole were the pesticides most frequently detected at levels that violated the Korean Food Code MRLs.

Simulation of Pesticide Fate and Transport in Drainage Channels

  • Chung, Sang-Ok;Park, Ki-Jung;Christen, E.W.
    • Journal of The Korean Society of Agricultural Engineers
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    • v.47 no.7
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    • pp.49-56
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    • 2005
  • Contamination in the drainage channels and creeks with pesticides used in agriculture is of a major concern in many countries. In this study the stream pesticide model RIVWQ (chemical transport model for riverine environments) was assessed for its applicability in simulating pesticide fate in drainage channels. The model was successfully calibrated against field data collected on flows and pesticide concentrations for a drainage channel from a small catchment in the Murrumbidgee Irrigation Area of southwestern New South Wales. The effects of different pesticide loading scenarios from farm fields on channel water quality were analysed by the calibrated model. The model simulated the flow rates and the pesticide concentrations in the drainage channel well. The results of the model simulation suggest that the RIVWQ model can be effectively used for predicting pesticide fate in the drainage channels and exposure assessment of pesticide in the agricultural environment.

Survey on Compliance of Pesticide Registration Standard and Pesticide Usage of Paddy Rice and Leaf Vegetables in Korea (농약등록기준 준수 현황과 수도 및 엽채소류 사용량 조사)

  • Kim, Kyung-Sun;Kim, Kang-Ho;Kim, Nam-Suk;Ihm, Yang-Bin;Lee, Hee-Dong;Kim, Hyu-Gyung;You, Oh-Jong;Oh, Byung-Youl;Im, Geon-Jae;Ryu, Gab-Hee
    • The Korean Journal of Pesticide Science
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    • v.10 no.3
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    • pp.183-188
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    • 2006
  • A nation-wide monitoring survey was performed to look into pesticide use pattern and amount on farmers' field after the national registration of pesticides from 2003 to 2004. Tow hundred ninety two leading farmers involved in the survey were chosen from main cultivating regions of targeted crops in consideration with area. Most farmers involved in the survey follow the safe use guideline of pesticides, while their information to select and making-decision for purchasing pesticides were done according to the recommendation of mainly pesticide market dealers or agricultural cooperative dealers. Used amount of pesticide per unit cropping area was surveyed as 5.51 on paddy, 3.91 on field cabbage, 2.93 on greenhouse cabbage, 0.76 on lettuce, 0.55 on spinach, 1.34 on perilla leaf, 4.89 on leek and 0.42 kg $ha^{-1}$ on young radish. As compound with those surveyed from 1999 to 2000, the pesticide amounts used for rice, lettuce and perilla leaf were reduced while that for cabbage was increased.

Research on Farming Practice Change of Low-pesticide Farmers (저농약인증 농가의 유기.무농약 전환의향 분석)

  • Jeong, Hak-Kyun;Moon, Dong-Hyun
    • Korean Journal of Organic Agriculture
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    • v.21 no.2
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    • pp.139-155
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    • 2013
  • The purpose of this study is to analyze the effects of abolishing the low-pesticide agricultural product certification on environmentally friendly farming. A survey was conducted to quantitatively analyze farming practices and factors that change farming practice. It was found that only 17.0% of low-pesticide fruit farmers said that they will change their farming practice into organic or pesticide-free farming. With regard to the factors of farming practice change, binomial logistic regression model was applied for the analysis. In the analysis, it was found that farmers who grow the low-pesticide agricultural product are more likely to change their farming practice into organic or pesticide-free farming, as their expected price of organic or pesticide-free products is high, their area size is small, price premium of low-pesticide agricultural product is low, the frequency of their training is high. It is necessary to enhance the direct payment system to enlarge organic and nonpesticide acreage, and pest management techniques for fruits should be developed for low-pesticide fruit farmers to change their practice into organic and nonpesticide practice. Dissemination of cultivation manual, introduction of insurance to farmers, improvement of certificate system, and advertising and marketing of environment-friendly agricultural products are useful to develop environment-friendly agriculture.

Increased Sister Chromatid Exchange in Peripheral Blood Lymphocytes from Humans Exposed to Pesticide: Evidence Based on a Meta-analysis

  • Yang, Hai-Yan;Liu, Jing;Yang, Si-Yu;Wang, Hai-Yu;Wang, Ya-Dong
    • Asian Pacific Journal of Cancer Prevention
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    • v.15 no.22
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    • pp.9725-9730
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    • 2014
  • Background: Sister chromatid exchange (SCE) in human peripheral blood lymphocytes is one of the most extensively studied biomarkers employed to evaluate genetic damage subsequent to pesticide exposure. Objective: To estimate the pooled levels of SCE in human peripheral blood lymphocytes among population exposed to pesticide. Materials and Methods: Meta-analysis on the association between SCE frequency and pesticide exposure was performed with STATA 10.0 software package and Review Manager 5.0.24 in this study. Results: The overall means of SCE were 7.88 [95% confidence intervals (95%CI): 6.71-9.04] for exposure group and 6.05 (95%CI: 5.13-6.95) for controls, respectively. There was statistically significant difference in the SCE frequency in human peripheral blood lymphocytes between pesticide-exposed groups and control groups, and the summary estimate of weighted mean difference was 1.69 (95%CI: 1.01-2.38). We also observed that pesticide-exposed population had significantly higher SCE frequency than control groups among smokers, nonsmokers, pesticide applicator, pesticide producer, other exposure population and Asian population in stratified analyses. Conclusions: Data indicate that the SCE frequency in human peripheral blood lymphocytes might be an indicator of early genetic esffects for pesticide-exposed populations.

Development of an Educational App for Safe Dietary Life based on Elementary School Parents' Perceptions on Pesticide Residue (초등학생 학부모들의 잔류농약 인식에 기초한 안전 식생활 교육용 앱 개발)

  • Chae, Hyeon-Ja;Kim, Jeong-Weon
    • Korean journal of food and cookery science
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    • v.29 no.2
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    • pp.161-168
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    • 2013
  • The purpose of this study was to develop an educational app that informs parents of elementary students with correct information on pesticide residue based on their awareness and information needs on pesticide residue. A survey was conducted from 918 parents living in 8 different districts of Korea. The results of the survey indicated that a majority of parents felt uncomfortable with pesticide residue and wanted to have the proper information regarding it. Based on the above results, an app named 'Perfect Conquest of Pesticide Residue' consisting of 5 main menus of 'Pesticide residue, Is it safe?', 'Safe management of pesticide residue', 'Perfect removal of pesticide residue on fruits and vegetables through washing', 'Shopping without anxiety', 'Playground' and their own sub-menus was developed. When the app was applied to 30 parents using smart phones, a majority of them were satisfied with the contents of detailed information and fun activities. Therefore, this app could be utilized as an effective educational tool for the parents of elementary students by allowing them to have proper awareness on pesticide residue. Furthermore, more apps could be developed on other food risk factors to promote safe dietary life.

A Pilot Study for Pesticide Poisoning Symptoms and Information on Pesticide Use among Farmers (일부 농업인에서의 농약 중독증상과 농약 사용정보에 대한 예비조사)

  • Kim, Hyun-Joong;Cha, Eun-Shil;Moon, Eun-Kyeong;Ko, You-Sun;Kim, Jae-Young;Jeong, Mi-Hye;Lee, Won-Jin
    • Journal of Environmental Health Sciences
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    • v.37 no.1
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    • pp.22-28
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    • 2011
  • This study aimed to determine the feasibility of survey questionnaires for pesticide poisoning. We conducted a pilot study to develop a questionnaire for evaluating pesticide poisoning symptoms and to examine the validity of self-reported information for individual pesticides used. In December 2010 we interviewed 20 farmers with self-reported pesticide poisoning histories residing in Gyeonggi Province. For validity of pesticide information, the purchased pesticide lists from the agricultural cooperative federation were compared with individual self-reported pesticides used. Neurological symptoms were the most common among clinical symptoms related to pesticide poisoning, followed by gastrointestinal, dermal and eye symptoms. Insecticides were the main causative pesticide class for poisoning. Twenty one major symptoms were selected for screening for acute pesticide poisoning in a field study based on the pilot results and literature reviews. Substantial under-reporting was found in data on self-reported individual pesticides used (9.2%), as well as low accuracy (36%) compared with their actual purchase lists. In this pilot study, we suggest the selected symptom lists may apply to a field survey of pesticide poisoning. However, the self-reported information on individual pesticides may not be valid and alternative methods need to be developed.

Monitoring on Endocrine Disruptors in Commercial Agricultural Products in the Northern Area of Seoul(2007) (서울 강북지역 유통 농산물의 내분비계장애 추정농약의 잔류실태(2007))

  • Ha, Kwang-Tae;Park, Sung-Kyu;Cho, Tae-Hee;Han, Chang-Ho;Kim, Sung-Dan;Lee, Kyeng-A;Kim, Si-Jung;Jang, Jung-Im;Jo, Han-Bin;Choi, Byung-Hyun
    • Journal of Food Hygiene and Safety
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    • v.24 no.2
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    • pp.136-142
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    • 2009
  • This study was carried out to investigate the current status of suspected endocrine disrupting pesticides among the agricultural products in northern area of Seoul in 2007. 3,026 samples was analyzed by multiresidue method. Detected Pesticide in 11 cases were procymidone, endosulfan, chlorothalonil, chlorpyrifos, cyermethrin, fenvalerate, hexaconazole, carbendazim, pendimethalin, permethrin, parathion and exceeded 7 cases of endosulfan, procymidone, carbendazim, chlorothalonil, chlorpyrifos, cypermethrin, fenvalerate in the maximum residue limits(MRLs). Procymidone, endosulfan, chlorothalonil and chlorpyrifos comprised up to 80.5% in detected pesticides. Among the 321 cases of detected agricultural products, 287 cases(89.4%) were vegetables, 25 cases (7.8%) were fruits, Others were 9 cases(2.8%).

Residue characteristics of hexaconazole and chlorothalonil in several fruits (과일의 형태적 특성에 따른 농약의 잔류성과 분포)

  • Lee, Hee-Dong;Kyung, Kee-Sung;Kwon, Hye-Young;Ihm, Yang-Bin;Kim, Jin-Bae;Park, Seung-Soon;Kim, Jang-Eok
    • The Korean Journal of Pesticide Science
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    • v.8 no.2
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    • pp.107-111
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    • 2004
  • The study was carried out to investigate the pesticide residual characteristics in peaches, pear and grape. Pesticide residue patterns were remarkably different because of major factors affecting the pesticide residue patterns such as ratios of surface to weight, surface matrices, cultivations, sizes, increase rate of weight, and varieties of fruits, etc.. Pesticide residue levels in grape appeared higher than those in peaches and pear, because the pesticide solution sprayed was infiltrated and accumulated between grape granules. The matrices composing of fruit surface and the ratios of surface area to weight on fruits seemed to playa key role for determining the pesticide residual characteristics in fruits.