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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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The Korean Journal of Pesticide Science
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Journal DOI :
The Korean Society of Pesticide Science
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Volume & Issues
Volume 16, Issue 4 - Dec 2012
Volume 16, Issue 3 - Sep 2012
Volume 16, Issue 2 - Jun 2012
Volume 16, Issue 1 - Mar 2012
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Synthesis and antifungal activities of 4-[5-(2-cyclopropylaminopyrimidin-4-yl)-4-arylthiazol-5-yl]piperidine derivatives on Phytophthora capsici
Nam, Seok-Woo ; Lee, Gyung-Rak ; Kim, Tae-Joon ; Chung, Bong-Jin ; Choi, Won-Sik ;
The Korean Journal of Pesticide Science, volume 16, issue 1, 2012, Pages 1~10
DOI : 10.7585/kjps.2012.16.1.001
Fungicidal activities against phytopathogenic fungi of diarylthiazole compound of 4-[5-(2-cyclopropylaminopyrimidin-4-yl)-4-(4-fluorophenyl)thiazol-5-yl]-1-methylpiperidine (I) have been determined to be excellent and compound I was used as the leading compounds in this study. Furthermore, the compound was synthesized by reacting them with five functional groups, 4-fluoro-3-methylphenyl, 4-fluoro-3-chlorophenyl, 4-chloro-2-fluorophenyl, 4-bromo-3-methylphenyl and 2,4-dichlorophenyl groups instead of 4-fluorophenyl group. Also, 2-amino-, 2-(N-ethoxycarbonyl)piperidin-4-yl-, and 2-piperidin-4-yl-thiazole were introduced as the leads instead of 2-N-methylpiperidine-4-yl-thiazol of compound I. VIII-1~VIII-5 and XIII-1~XV-5 compounds were newly synthesized and their structures were confirmed by
-NMR-spectrum. The fungicidal activities of all the synthesized compounds against Phytophthora capsici were examined using the whole plant method. Among the VIII-1~VIII-5 and XIII-1~XV-5 chemicals, XIV-3 showed the most potent antifungal activity in vivo. While the
values of the commercial fungicide dimethomorph and I were
, those of 4-[5-(2-cyclopropylaminopyrimidin-4-yl)-4-(4-chloro-2-fluorophenyl)thiazol-5-yl]-1-methylpiperidine (XIV-3) was
. Therefore, XIV-3 can be considered as a viable candidate for the control of plant diseases caused by P. capsici, and further studies will be conducted on the mode of action XIV-3.
Degradation of the Selected Pesticides by Gas Discharge Plasma
Min, Zaw Win ; Hong, Su-Myeong ; Mok, Chul-Kyoon ; Im, Geon-Jae ;
The Korean Journal of Pesticide Science, volume 16, issue 1, 2012, Pages 11~20
DOI : 10.7585/kjps.2012.16.1.011
As increasing the use of pesticides both in number and amount to boost crop production, consumer concerns over food quality and safety with respect to residual pesticides are also continuously increasing. However, there is still lacking of information that can effectively help to remove residual pesticides in foods. In recent years, contaminant removal by gas (or) glow discharge plasma (GDP) attracts great interests on environmental scientists because of its high removal efficiency and environmental compatibility. It was shown to be effective for the removal of some organophosphorus pesticides, phenols, benzoic acid, dyes, and nitrobenzene on solid substrate or in aqueous solution. This work mainly focuses on the removal of wide range of residual pesticides from fresh fruits and vegetables. As for preliminary study, the experiments were carried out to investigate whether GDP can be used as an effective tool for degrading target pesticides or not. With this objective, 60 selected pesticides drop wised onto glass slides were exposed to two types of GDP, dielectric barrier discharge plasma (DBDP) and low pressure discharge plasma (LPDP), for 5 min. Then, they were washed with 2 mL MeCN which were collected and used for determination of remaining concentration of pesticides using LC-MS/MS. Among selected pesticides, degradation of 18 pesticides (endosulfan-total was counted as one pesticide) by GDP could not be examined because control treatments, which were left in ambient environment, of those pesticides recovered less than 70% or even did not recover. However, majority of tested pesticides (42) were degraded by both types of GDP with satisfactory recovery (>80%) of control sample. Pesticides degradation ranged from 66.88% to 100% were achieved by both types of plasma except clothianidin which degradation in LPDP was 26.9%. The results clearly indicate that both types of gas discharge plasma are promising tools for degrading wide range of pesticides on glass substrate.
Dietary Exposure Assessment by Ages due to Pesticide Residues in Vegetables
Jang, Mi-Ra ; Moon, Hyun-Kyung ; Kim, Tae-Rang ; Yuk, Dong-Hyun ; Kim, Eun-Hee ; Hong, Chae-Kyu ; Choi, Chae-Man ; Hwang, In-Sook ; Kim, Jung-Hun ; Kim, Moo-Sang ; Chae, Young-Zoo ;
The Korean Journal of Pesticide Science, volume 16, issue 1, 2012, Pages 21~27
DOI : 10.7585/kjps.2012.16.1.021
Dietary exposure assessment by ages was performed in this study using pesticide residues data examined in vegetable commodities collected in Seoul from 2007 to 2009, and the vegetable intakes for Seoulites which were obtained after analysing the Korea National Health and Nutrition examination survey data of 2008. There was a statistical difference for vegetable intakes by ages (P<0.001). Vegetable intake was the highest in 40~59 age group and was the lowest in under 5 age group. The %ADI was calculated using vegetable pesticide residues and vegetable intake for Seoulites by ages. Considering below 1 of the %ADI by ages, the risk caused by pesticide residues in vegetables was very low and vegetable intake was safe.
Survey of Multi Residual Pesticides in Materials of Korean Traditional Herbal Tea
Kim, Nan-Young ; Kim, Young-Sug ; Kim, Myung-Gil ; Jung, Hong-Rae ; Kim, Yun-Sung ; Kim, Han-Taek ; Lee, Sun-Woo ; Chae, Kyeng-Suk ; Yoon, Mi-Hye ;
The Korean Journal of Pesticide Science, volume 16, issue 1, 2012, Pages 28~34
DOI : 10.7585/kjps.2012.16.1.028
We analysed 149 samples of Korean traditional herbal tea materials. The 156 pesticides were analyzed by GC/ECD and NPD, detected pesticides were confirmed by GC-TOF/MS. Sample preparation was performed bv multi-residue analysis method of multiclass pesticides of the Korea Food Code. The residual pesticides were detected in 22 samples(14.8%), the highest detection frequency samples are lycium and jujube. Detected pesticides in Korean traditional herbal tea materials were chlorpyrifos (5 samples), chlorothalonil (3 samples), cypermethrin (3 samples), hexaconazol (3 samples) and cyhalothrin(3 samples). The pesticide types detected in Korean traditional herbal tea materials were organophosphorus(29.2%), pyrethroids(16.7%), organochlorines (12.5%) and triazoles(12.5%). The 5 samples(lycium, jujube, chrysanthemum, balloon-flower, milk vetch root) were detected pesticides below MRLs, 2 samples(cornus fruit, cnidium) were detected pesticides unnotificated MRLs.
Residual Characteristics and Processing Factors of Difenoconazole in Fresh Ginseng and Processed Ginseng Products
Noh, Hyun-Ho ; Lee, Kwang-Hun ; Lee, Jae-Yun ; Lee, Eun-Young ; Park, Young-Soon ; Park, Hyo-Kyoung ; Oh, Jae-Ho ; Im, Moo-Hyeog ; Lee, Yong-Jae ; Baeg, In-Ho ; Kyung, Kee-Sung ;
The Korean Journal of Pesticide Science, volume 16, issue 1, 2012, Pages 35~42
DOI : 10.7585/kjps.2012.16.1.035
This study was carried out to elucidate the residual characteristics and calculate processing factors of difenoconazole in ginseng and its processed products, such as dried ginseng, red ginseng and their water and alcohol extracts. The pesticide was sprayed onto the ginseng according to its pre-harvest intervals in 2009 (four-year-old ginseng) and 2010 (five-year-old ginseng). Harvested ginseng was processed to dried ginseng, red ginseng and their extracts according to the commercially well-qualified conventional methods provided by the Korea Ginseng Corporation. Limit of detection (LOD) and limit of quantitation (LOQ) of difenoconazole in fresh ginseng were 0.001 and 0.003 mg/kg, respectively. In case of processed ginseng products, their levels were 0.002 and 0.007 mg/kg, respectively. Concentration of difenoconazole in both fresh ginseng and its processed products increased with the experimental period. Processing factors, calculated as a ratio of difenoconazole concentration in processed products to fresh ginseng were found to be 1.71 to 2.17 and 1.62 to 2.03 in case of dried and red ginseng, respectively, while those for their extracts ranged from 1.76 to 2.98. In case of five-year-old dried ginseng and red ginseng as well as their extracts, the ranges of processing factor of difenoconazole were found to be 2.9 to 3.1, 1.9 to 2.2 and 2.4 to 4.7, respectively.
Monitoring of Pesticide Residues in Commercial Environment-friendly Stalk and Stem Vegetables and Leafy Vegetables and Risk Assessment
Lee, Jae-Yun ; Noh, Hyun-Ho ; Lee, Kwang-Hun ; Park, So-Hyun ; Kyung, Kee-Sung ;
The Korean Journal of Pesticide Science, volume 16, issue 1, 2012, Pages 43~53
DOI : 10.7585/kjps.2012.16.1.043
In order to monitor the levels of pesticides in environment-friendly stalk and stem vegetables and leafy vegetables selling at markets in Korea. A total of 637 (395 organic agricultural products, 242 pesticide-free agricultural products) samples of 21 stalk and stem vegetables and leafy vegetables were collected twice from markets in July and August 2010 in Korea. Pesticide residues in samples were analyzed by multiresidue method for 240 pesticides using GC-ECD/NPD and HPLC-DAD/FLD. The suspected-pesticides were confirmed with a GC-MSD. As a result of analysis, six pesticides were detected from eight samples, representing a detection rate of 1.3% and amounts of pesticide residues in samples were as follows: alachlor 0.043, chlorfenapyr 0.022-0.324, diazinon 0.024, dicofol 0.009-0.138, dithiopyr 0.008, metolachlor 0.025 mg/kg. Their residue levels were below the MRLs. Estimated daily intakes (EDIs) of the pesticides detected from stalk and stem vegetables and leafy vegetables were less than 25% of their acceptable daily intakes (ADIs), representing that residue levels of the pesticides detected were evaluated as safe for consumption. However, five samples containing pesticide residues were unsuitable environment-friendly products because of pesticides detected more than their 10% MRLs in organic and pesticide-free agricultural products.
Analysis of Mitochondrial Gene Sequence in Etoxazole Resistant Two-Spotted Spider Mite, Tetranychus urticae
Park, Sang-Eun ; Koo, Hyun-Na ; Yoon, Chang-Mann ; Choi, Jang-Jeon ; Kim, Gil-Hah ;
The Korean Journal of Pesticide Science, volume 16, issue 1, 2012, Pages 54~61
DOI : 10.7585/kjps.2012.16.1.054
The two-spotted spider mite, Tetranychus urticae Koch (Acari: Tetranychidae), is one of the most important pest species devastating many horticultural and ornamental crops and fruit trees. Difficulty in managing this mite is largely attributed to its ability to develop resistance to many important acaricides. Development of 3,700-folds resistance to etoxazole was found in the population of T. urticae collected from rose greenhouses in Buyeo, Chungnam Province in August 2000. This population has been selected for eleven years with etoxazole (over 500 times), and increased over 5,000,000-folds in resistance as compared with susceptible strain. Also, etoxazole-resistant strain was shown to be maternally inherited. The objective of this study was to determine whether resistance of T. urticae to etoxazole was linked with point mutations in the mitochondrial gene. DNA sequencing of cytochrome c oxidase subunit I (COX1), COX2, COX3, cytochrome b (CYTB), NADH dehydrogenase subunit 1 (ND1), ND2, ND3, ND4, ND5, and ND6 were analyzed by comparing two etoxazole-susceptible and etoxazole-resistant strains. As a result, differences were not detected between the nucleotide sequences of two strains within a mitochondrial gene.
The Ecological Health Screening Assessment of Agricultural area using Biomarkers and Bioindicators in Misgurnus Anguillicaudatus (case study)
Kim, Ja-Hyun ; Han, Sun-Young ; Yeom, Dong-Hyuk ;
The Korean Journal of Pesticide Science, volume 16, issue 1, 2012, Pages 62~68
DOI : 10.7585/kjps.2012.16.1.062
This study evaluated the screening level assessment of ecological health using four biomarkers and four bioindicators of Misgurnus anguillicaudatus as a indicator species in agricultural area of South Korea during May-June 2011. The endocrine disrupting chemical (EDC) indicators, such as vitellogenin (VTG) and gonado-somatic index (GSI), were not significantly changed in the agricultural site (p>0.05), indicating no effects. The biomarkers and bioindicators were compared between two sites of reference site (RS) and the agricultural site (AS) for screening assessment of ecological health. The ethoxyresorufin-O-deethylase (EROD) activity, acetylcholinesterase (AChE) activity, and DNA damage were significantly changed in the AS compared with the RS (p<0.05). But the individual level bioindicators such as condition factor (CF), hepato-somatic index (HSI), and gonado-somatic index (GSI) were not significantly different from reference site (RS). These results may indicate impairments of ecological health by toxic chemicals and environmental conditions. Current this study is based on screening assessment of biochemical and individual level biomarkers and bioindicators, so further study is required additional biomarkers and population or community level bioindicators for more specific health assessments in agricultural areas.
Effects on Biomarkers and Endocrine in Muddy Loach (Misgurnus anguillicaudatus) under 21 day Exposure to Methomyl
Han, Sun-Young ; Kim, Ja-Hyun ; Gwon, Ga-Young ; Yeom, Dong-Hyuk ;
The Korean Journal of Pesticide Science, volume 16, issue 1, 2012, Pages 69~77
DOI : 10.7585/kjps.2012.16.1.069
To evaluate the effect of endocrine disruption chemicals (EDCs) to aquatic organisms, muddy loach (Misgurnus anguillicaudatus) was exposed to low concentration methomyl for 21 days in order to identify the effect of biomarkers and endocrine. Vitellogenin (VTG) in blood plasma, which used widely as validated biomarker for endocrine disruption, was significantly greater in male fish exposed to 0.4 mg/L and 2 mg/L methomyl, and in female fish exposed to 0.08 mg/L, 0.4 mg/L, and 2 mg/L methomyl for 21 days (p<0.05). This results suggest that methomyl have probability of endocrine disruption to organism on aquatic system. While inhibition of Acetylcholinesterase (AChE) activity and increase of DNA damage in comet assay were verified by fish exposed to methomyl, change of ethoxyresorufin-O-deethylase (EROD) activity was not occurred, comparing the control group (p<0.05). Indicators at the level of organism such as condition factor (CF), hepato-somatic index (HSI), and gonado-somatic index (GSI) were not influenced by exposure of methomyl. In conclusion, these results showed the possibility of methomyl in regard to not only endocrine disruption but also impacts on biochemical biomarkers to aquatic organisms.
Correlation and Sensitivity of Acute Toxicity of Pesticides on the Common Carp(C. carpio) and Killifish(O. latipes)
Bae, Chul-Han ; Park, Yeon-Ki ; Kim, Yeon-Sik ; Cho, Kyung-Won ; Lee, Suk-Hee ; Jung, Chang-Kook ; Lee, Kyu-Seung ;
The Korean Journal of Pesticide Science, volume 16, issue 1, 2012, Pages 78~83
DOI : 10.7585/kjps.2012.16.1.078
The recommended species in fish acute toxicity test for pesticide registration in korea are common carp (Cyprinus carpio), killifish(Oryzias latipes) and loach(Misgurnus anguillicaudatus). But most of fish toxicity was evaluated using common carp. The common carp has several problems such as difficulty of room breeding, difference of sensitivity to breeding condition, limited experimental period, etc. For that reason, it is necessary to reexamine of test species. The present study investigated the sensitivity and correlation of
values that determined using the acute toxicity test with common carp and killifish. And this study is a realistic approach to evaluated appropriate species for fish acute toxicity test of pesticide. As a result, correlation coefficient(R) of the commom carp and killifish was high correlation of 0.8480 and the
values was not significant in the interspecies sensitivity. When the
values of common carp and killifish was compared with fish toxicity guideline in Korea, fish toxicity class has fluctuated in 18 pesticides with not very special tendency. Therefore, it is necessary to review of killifish has more advantage to standardization of fish culture and in the side of correlation and sensitivity of acute toxicity.