• Title, Summary, Keyword: 생산단계 잔류허용기준

Search Result 38, Processing Time 0.036 seconds

Field tolerance of pesticides in the strawberry and comparison of biological half-lives estimated from kinetic models (Kinetic models에 의한 딸기 중 농약의 생물학적 반감기 비교와 생산단계잔류허용기준 설정)

  • Park, Dong-Sik;Seong, Ki-Young;Choi, Kyu-Il;Hur, Jang-Hyun
    • The Korean Journal of Pesticide Science
    • /
    • v.9 no.3
    • /
    • pp.231-236
    • /
    • 2005
  • This study was conducted to determine the amounts of pesticide residues after treatment of criterion dose with 4 pesticides(tolclofos-m, folpet, procymidone, and triflumizole) under cultivated period and to compare the biological half-life of pesticides with 6 kinetic models(first, zero and second order kinetics, power function, elovich and parabolic model) and to establish proposed field tolerance using biological half-lives. Recovery of 4 pesticides form strawberry was ranged from 85.1 to 105.5%. For all of 4 pesticides, dissipation rate was over 73% at 5 days after application. Among 6 kinetic models, first order kinetic model (FO) was best fit to describe the relationship between residual pattern of pesticides and time. Therefore, half-lives were calculated by FO for establishing the field tolerance. These results showed that half-life should be calculated by comparative best fit kinetic model and field tolerance can help to prevent unacceptable agricultural products from marketing. It is good for both consumers and farmers having safe agricultural products and financial benefits, respectively.

Establishment of Pre-Harvest Residue Limits of Clothianidin and Thiacloprid in Ginseng (인삼 중 Clothianidin 및 Thiacloprid의 생산단계 농약잔류허용기준 설정)

  • Na, Eun-Shik;Lee, Yong-Jae;Kim, Kyoung-Ju;Kim, Seong-Soo;Lee, Kyu-Seung
    • The Korean Journal of Pesticide Science
    • /
    • v.17 no.3
    • /
    • pp.155-161
    • /
    • 2013
  • The residue patterns of clothianidin and thiacloprid, insecticides registered in the ginseng, were investigated to predict pre-harvest residues limits (PHRL). Pesticides were treated under Korea GAP (Good Agricultural Practices) with the recommended dose (single dose) and twice of recommended dose (double dose). Samples were collected 11 times over 42 days (each 0, 2, 5, 8, 12, 16, 20, 24, 28, 33, 42 days after treatment). Residues of clothinidin and thiacloprid were analyzed by UPLC/TQD. Biological half-life of clothinidin in single dose and double dose were 14.6 days and 10.2 days and that of thiacloprid were also 9.7 days and 11.2 days, respectively. The PHRL of ginseng on 10 days before harvest was 0.3 mg/kg in clothianidin and 0.18 mg/kg in thiacloprid.

Dissipation Pattern of Amisulbrom in Cucumber under Greenhouse Condition for Establishing Pre-harvest Residue Limit (생산단계 잔류허용 기준 설정을 위한 시설 재배 오이 중 살균제 Amisulbrom의 잔류특성 연구)

  • Hwang, Kyu-Won;Kim, Tae Wan;Yoo, Jae-Hong;Park, Byeoung-Soo;Moon, Joon-Kwan
    • The Korean Journal of Pesticide Science
    • /
    • v.16 no.4
    • /
    • pp.288-293
    • /
    • 2012
  • The dissipation patterns of amisulbrom in cucumber under a greenhouse condition was investigated to establish biological half-life and pre-harvest residue limit (PHRL). Amisulbrom residue in/on cucumber on the day of application under standard application condition was $0.15mg\;kg^{-1}$ and decreased to $0.06mg\;kg^{-1}$ after 5 days after treatment, so that biological half-life calculated 3.6 day, while initial concentration of amisulbrom twice application 3 days interval under standard application condition was $0.35mg\;kg^{-1}$ and decreased to $0.09mg\;kg^{-1}$ after same period and the biological half-life calculated 2.4 day. PHRL was suggested by prediction curve calculated from the decay constant of amisulbrom at standard rate. For example, $1.83mg\;kg^{-1}$ at 5 days before harvest and $1.03mg\;kg^{-1}$ at 2 days before harvest were suggested.

Residual Characteristics of Bistrifluron and Fluopicolide in Korean Cabbage for Establishing Pre-Harvest Residue Limit (생산단계 잔류허용기준 설정을 위한 엇갈이배추 중 bistrifluron과 fluopicolide의 잔류 특성 연구)

  • Lee, Dong Yeol;Jeong, Dong Kyu;Choi, Geun-Hyoung;Lee, Deuk-Yeong;Kang, Kyu Young;Kim, Jin Hyo
    • The Korean Journal of Pesticide Science
    • /
    • v.19 no.4
    • /
    • pp.361-369
    • /
    • 2015
  • This study investigated residual characteristics of bistrifluron and fluopicolide in Korean cabbage, and suggested the pre-harvest residue limits (PHRLs) based on their dissipation patterns and biological half-lives. The pesticides were sprayed on Korean cabbage in two different region under greenhouse conditions at the recommended dose, respectively. The samples for residue analysis were harvested at 0 (2 hr), 1, 2, 4, 6, 8 and 10 days after treatment, and analyzed by HPLC after clean-up with Florisil SPE. The limit of quantification (LOQ) was $0.03mg\;kg^{-1}$ for bistrifluron and fluopicolide, and the recoveries ranged from 87.2-110.6% with below 5% of RSD. The biological half-lives of field I and field II were 3.9 and 4.2 days for bistrifluron and 4.9 and 4.2 days for fluopicolide, respectively. The PHRL of bistrifluron and fluopicolide were recommended as 3.83 and $3.23mg\;kg^{-1}$ for 10 days before harvest, respectively.

Establishment of Pre-Harvest Residue Limit (PHRL) of Insecticide Bifenthrin during Cultivation of Grape (포도의 재배기간 중 살충제 bifenthrin의 생산단계 농약잔류허용기준의 설정)

  • Kim, Sung-Woo;Lee, Eun-Mi;Lin, Yang;Park, Hee-Won;Lee, Hye-Ri;Riu, Myoung-Joo;Na, Ye-Rim;Noh, Jae-Eok;Keum, Young-Soo;Song, Hyuk-Hwan;Kim, Jeong-Han
    • The Korean Journal of Pesticide Science
    • /
    • v.13 no.4
    • /
    • pp.241-248
    • /
    • 2009
  • Pre-Harvest Residue Limit (PHRL) of bifenthrin during cultivation of grape was established by utilizing the dissipation curve and biological half-life of bifenthrin calculated from the analysis of 0, 1, 2, 3, 5, 7, 10, 15 days after treatment of bifenthrin. Grape sample was extracted and partitioned with acetonitrile and dichloromethane, respectively, and bifenthrin was determined with GC/ECD. Limit of quantitation (LOQ) of bifenthrin was 0.01 ng. Recoveries at two fortification levels of 0.1 and $0.5\;mg\;kg^{-1}$ were $104.08\;{\pm}\;1.24$ and $92.25\;{\pm}\;3.13%$, respectively. The biological half-lives of bifenthrin were about 21 days at standard application rate, while, 23 days at double application rate. Dissipation of bifenthrin on grape was not influenced by growth dilution effect. The PHRLs of bifenthrin were recommended as 0.60 and $0.55\;mg\;kg^{-1}$ for 10 and 5 days before harvest, respectively.

Establishment of Pre-Harvest Residue Limit (PHRL) of Fungicides Azoxystrobin and Difenoconazole on Prunus mume fruits (매실 중 살균제 azoxystrobin과 difenoconazole의 생산단계 잔류허용기준 설정)

  • Lee, Dong Yeol;Kim, Yeong Jin;Park, Min Ho;Lee, Seung Hwa;Kim, Sang Gon;Kang, Nam Jun;Kang, Kyu Young
    • The Korean Journal of Pesticide Science
    • /
    • v.17 no.4
    • /
    • pp.307-313
    • /
    • 2013
  • This study was carried out to investigate the residual characteristics of fungicide azoxystrobin and difenoconazole in Prunus mume fruits, and establish pre-harvest residue limits (PHRL) based on dissipation and biological half-lives of fungicide residues. The fungicides were sprayed onto the crop at recommended dosage once and 3 times in 7 days interval, respectively. The samples were harvested at 0, 1, 2, 4, 6, 8, 10, 12 and 14 days after treatment. These residual pesticides were extracted with QuEChERS method, clean-up with $NH_2$ SPE cartridge, and residues were analyzed by HPLC/DAD and GLC/ECD, respectively. Method quantitative limits (MQL) of azoxystrobin were 0.03 mg $kg^{-1}$ and of difenoconazole were 0.006 mg $kg^{-1}$. Average recovery were $93.2{\pm}2.49%$, $85.5{\pm}1.97%$ for azoxystrobin at fortification levels at 0.3 and 1.5 mg $kg^{-1}$, and $100.8{\pm}6.74%$, $87.6{\pm}9.92%$ for difenoconazole at fortification levels at 0.06 and 0.3 mg $kg^{-1}$, respectively. The biological half-lives of azoxystrobin were 5.9 and 5.2 days at recommended dosage once and 3 times in 7 days interval, respectively. The biological half-lives of difenoconazole were 9.3 and 8.0 days at recommended dosage once and 3 times in 7 days interval, respectively. The PHRL of azoxystrobin and difenoconazole were recommended as 5.32 and 1.64 mg $kg^{-1}$ for 10 days before harvest, respectively.

Establishment of Pre-Harvest Residue Limit for Buprofezin and Penthiopyrad during Cultivation of Oriental melon (Cucumis melon var. makuwa) (참외(Cucumis melon var. makuwa)에 대한 Buprofezin 및 Penthiopyrad의 생산단계 잔류허용기준 설정)

  • Kim, Hea Na;Kim, Seong Beom;Choi, Eun;Woo, Min Ji;Kim, Ji Yoon;Saravanan, Manoharan;Hur, Jang Hyun
    • The Korean Journal of Pesticide Science
    • /
    • v.18 no.3
    • /
    • pp.123-129
    • /
    • 2014
  • The present work was aimed to determine the pre-harvest residue limits (PHRLs) and the safety management of commonly used pesticides namely buprofezin and penthiopyrad on oriental melon (Cucumis melon var. makuwa). In this study, the buprofezin (diluted two thousand fold) and penthiopyrad (diluted four thousand fold) were sprayed single time on oriental melon in the cultivation areas Sangju (site 1) and Sungju (site 2). Oriental melon were randomly collected from the both areas at the end of 0 (2 hours after pesticides spaying), 1, 2, 3, 5, 7, 9 and 10 days. For analysis, each samples were partitioned twice (80 and 70 mL) with dichloromethane and purified by florisil SPE cartridge. Finally, the residual amounts of both pesticides in all samples were analyzed using gas chromatography/nitrogen phosphorus detector (GC/NPD). In this study, the method limit of quantification (MLOQ) for both buprofezin and penthiopyrad in oriental melon was found to be $0.01mg\;kg^{-1}$ and their recovery levels were 91.1~98.6% and 90.0~104.6%, respectively. Further, the calculated biological half-life for buprofezin and penthiopyrad in oriental melon were 3.9 and 3.5, and 3.0 and 2.7 days in site 1 and 2, respectively. The results of this study found that the PHRLs for buprofezin and penthiopyrad were 4.24 and $2.31mg\;kg^{-1}$, respectively at 10 days before harvest. Consequently, the present study suggest that the residual amounts of both pesticides will be lower than the maximum residue limits (MRLs) when oriental melon is harvested.

열무 중 살충제의 잔류농약 분해 특성 연구

  • 김준형;서혜영;최근영;정양모;박순연;김관수;최택열;손길선;김경수
    • Proceedings of the Korean Society of Postharvest Science and Technology of Agricultural Products Conference
    • /
    • /
    • pp.150.1-150
    • /
    • 2003
  • 열무의 안전한 생산을 위한 생산단계에서의 각 농약 잔류량 변화 추이와 최종 소비단계에서의 농산물 안전성 평가자료로 활용하기 위하여 실제 시험포장에 열무를 파종한 후 수확 10일 전에 4 종(diazinon, endosulfan, cypermethrin, cyhalothrin)의 살충제를 각 성분별로 안전사용 기준에 따라 기준량 및 배량의 처리구에 직접 살포하여 열무의 포장상태에서의 잔류량 감소(생물학적 반감기) 변화를 조사하였다. 각 농약별로 2 수준 농도의 표준물질을 첨가하여 실험한 결과 평균회수율은 diazinon 98.7∼99.9%, endosulfan 97.6∼98.5%, cypermethrin 98.3∼99.6%, cyhalothrin 98.4∼99.1%이였고, 검출한계는 diazinon 및 cypermethrin은 0.04 mg/kg, endosulfan은 0.012 mg/kg, cyhalothrin은 0.01 mg/kg 이었다. 약제 살포 후 분해속도가 빠른 성분은 diazinon > endosulfan > cypermethrin >cyhalothrin 순이었다. 작물체(열무)내에서 시간의 경과에 따른 잔류량의 변화를 1차 반응으로 표현하여 농약 4종의 살포농도별 생물학적 반감기를 산출한 결과, 기준량 살포의 경우 diazinon 0.9일, endosulfan 2.0일, cypermethrin 2.2일, cyhalothrin 2.5일 그리고 배량 살포의 경우에는 diazinon 1.1일, endosulfan 2.0일, cypermethrin 2.1일, cyhalothrin 2.2일로 나타났다. 안전한 농산물 생산을 위한 열무 중 약제 살포 후 수확일은 잔류허용기준(MRL)을 적용시킬 경우 기준량으로 볼 때 diazinon은 6일 후, endosulfan은 10일 후에 수확하는 것이 바람직한 것으로 나타났으며 합성 피레스로이드계인 cypermethrin과 cyhalothrin은 농약살포 후 2 시간 후에 농약 잔류량이 잔류허용기준 미만으로 나타났다.

  • PDF

Establishment of Pre-Harvest Residue Limit(PHRL) of the Fungicide Amisulbrom during Cultivation of Winter-Grown Cabbage (엇갈이배추 재배기간 중 살균제 Amisulbrom의 생산단계 잔류허용기준 설정)

  • Ahn, Kyung-Geun;Kim, Gyeong-Ha;Kim, Gi-Ppeum;Kim, Min-Ji;Hong, Seung-Beom;Hwang, Young-Sun;Kwon, Chan-Hyeok;Son, Young Wook;Lee, Young Deuk;Choung, Myoung-Gun
    • Korean Journal of Environmental Agriculture
    • /
    • v.34 no.2
    • /
    • pp.120-127
    • /
    • 2015
  • BACKGROUND: Supervised residue trials were conducted to establish pre-harvest residue limit(PHRL), a criterion to ensure the safety of the pesticide residue in the crop harvest, of amisulbrom for winter-grown cabbage in two fields. Following to application of amisulbrom on the crop, time-course study was carried out to obtain the amisulbrom dissipation of statistical significance which enabled to calculate the predicted values of PHRL. METHOD AND RESULTS: During cultivation under greenhouse condition, samples of winter-grown cabbage were collected at 0, 1, 3, 5, 7 and 10 days after amisulbrom application, and subjected to residue analysis. Analytical method was validated by recoveries ranging 93.7~100.0% as well as limit of quantitation(LOQ) of 0.04 mg/kg. Amisulbrom residues in winter-grown cabbage gradually decreased as time elapsed. The dissipation rate of the residue would be affected by intrinsic degradation along with dilution by the cabbage growth. The decay pattern was well fitted by the simple first-order kinetics. CONCLUSION: Biological half-lives of amisulbrom in winter-grown cabbage ranged 3.7~4.1 days in two field conditions. Based on the regression of amisulbrom dissipation, PHRLs of amisulbrom in winter-grown cabbage were recommended as 8.86~9.47 and 4.21~4.35 mg/kg for 10 and 5 days before harvest, respectively.

Establishment of Pre-Harvest Residue Limits (PHRL) of Flubendiamide and Pyriofenone on Strawberry (Fragaria ananassa Duch.) (생산단계 잔류허용기준설정을 위한 Flubendiamide 및 Pyriofenone의 딸기(Fragaria ananassa Duch.) 중 경시적 잔류특성 연구)

  • Kim, Hee-Gon;Kim, Ji-Yoon;Hur, Kyung-Jin;Kwon, Chan-Hyeok;Hur, Jang Hyun
    • The Korean Journal of Pesticide Science
    • /
    • v.21 no.1
    • /
    • pp.62-67
    • /
    • 2017
  • In this study, the residue patterns of flubendiamide and pyriofenone registered in the strawberry were investigated to predict pre-harvest residue limit (PHRL). The samples were harvested at 0, 1, 2, 3, 5, 7, 10 days after treatment and the pesticide residues were analyzed by HPLC/UVD. The limit of quantification (LOQ) was $0.01mg\;kg^{-1}$ for flubendiamide and pyriofenone. The recovery levels of flubendiamide and pyriofenone were $90.9{\pm}2.2%$ and $81.9{\pm}0.8%$, $87.7{\pm}2.1%$ and $85.3{\pm}1.1%$ for spiked levels of 0.01 and $0.1mg\;kg^{-1}$, respectively. The values of biological half-lives for field 1 and field 2 were 8.1 and 7.2 days for flubendiamide, 7.0 and 6.9 days for pyriofenone. According to these results, we recommends the level of PHRL on strawberry for flubendiamide and pyriofenone as 1.87 and $3.76mg\;kg^{-1}$ at 10 days before harvest, respectively.