Plant Back Interval of Fluopyram Based on Primary Crop-derived Soil and Bare Soil Residues for Rotational Cultivation of Radish

Kim, Young Eun; Yoon, Ji Hyun; Lim, Da Jung; Kim, Seon Wook; Cho, Hyun-Jeong; Shin, Byeung Gon; Kim, Hyo Young; Kim, In Soo

doi:10.5338/kjea.2021.40.2.12

Cited by 3 publications

(2 citation statements)

References 14 publications

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“…According to the OECD guidelines [ 42 ], the PBI should be studied over a 7–30 day period for lettuce, given that it is a rotational crop. Following OECD guidelines, the RDA of Korea recommends conducting PBI studies over 30 and 60 days for lettuce and spinach, respectively [ 43 , 44 ]. Based on soil dissipation and UTR values for diazinon, we estimated a PBI of diazinon for lettuce complying with the PLS threshold.…”

Section: Discussionmentioning

confidence: 99%

Uptake of Soil-Residual Diazinon by Rotational Lettuce under Greenhouse Conditions

Yoon

Lim

Lee

et al. 2022

Foods

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Pesticide residue is an increasing concern in rotational crop practices. The pesticide used for the primary crop may re-enter the secondary crop, thus exceeding pesticide levels set by the positive list system (PLS). As such, evaluation of pesticide residue translocated into rotational crops is required for ensuring pesticide safety. In this study, we investigated the residue pattern of diazinon translocated into lettuce as a typical rotational crop in Korea. Diazinon was used to treat greenhouse soil at the maximum annual application rate before crop planting. Diazinon residues in soil and lettuce were investigated using liquid chromatography/tandem mass spectroscopy and a modified quick, easy, cheap, effective, rugged, safe (QuEChERS) method. The limit of quantitation (LOQ) of diazinon was found as 0.005 mg/kg for the plant and soil samples. The recovery of diazinon at the LOQ and 10× the LOQ ranged from 100.2% to 108.7%. The matrix calibration curve showed linearity, with R2 values > 0.998. Diazinon residue in soil dissipated over time after the initial treatment, generating first-order kinetics (R2 = 0.9534) and having a half-life of about 22 days. The uptake ratio (UTR) of diazinon from the soil to the plant ranged from 0.002 to 0.026 over the harvest period. Considering the UTRs, diazinon residue in the edible leaf could exceed the PLS level (0.01 mg/kg) if lettuce is rotated in soil containing >0.357 mg/kg of diazinon. Based on our findings, to comply with the PLS, a 3-month plant-back interval is required following diazinon treatment and/or setting the maximum residue limit of diazinon for lettuce.

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Section: Discussionmentioning

confidence: 99%

Uptake of Soil-Residual Diazinon by Rotational Lettuce under Greenhouse Conditions

Yoon

Lim

Lee

et al. 2022

Foods

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“…However, the residual pesticides in agricultural products due to their use are a major factor in endangering human health [3]. Therefore, in the Republic of Korea (ROK), for agricultural products without set maximum residue limits (MRLs), the Positive List System (PLS) is applied to restrict pesticides to below 0.01 mg/kg as regulated by the Rural Development Administration (RDA) [4]. Additionally, to minimize damages to producers and consumers, ROK sets pre-harvest residue limits (PHRLs) to manage residual pesticides before cultivation.…”

Section: Introductionmentioning

confidence: 99%

Dissipation Kinetics and Risk Assessment of Diniconazole, Dinotefuran, Metconazole, and Tebuconazole in Raphanus sativus L.

Kwak

Song

et al. 2023

Foods

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This study investigated the degradation characteristics and conducted a risk assessment of four pesticides (Diniconazole, Dinotefuran, Metconazole, and Tebuconazole) in the leaves and roots of radish. Radish was cultivated in two greenhouse fields, and samples were collected at 0, 1, 2, 3, 5, 7, and 10 days after pesticide application. Sample analysis was performed using LC-MS/MS, and the recovery rates ranged from 70.1% to 118.6%. The biological half-life of Diniconazole was found to be 6.2 days (leaf and root), Dinotefuran was 5.3 days (leaf) and 4.6 days (root), Metconazole was 9.3 days (leaf) and 3.2 days (root), and Tebuconazole was 8.0 days (leaf) and 5.1 days (root). After comparing the maximum residue limits (MRL) of each pesticide in Korea with the residues during the pre-harvest interval (PHI), Diniconazole showed a Hazard quotient (HQ) exceeding 1, indicating potential risks for true consumers. Furthermore, Tebuconazole showed an HQ of 0.3 or higher, indicating a significant level of risk.

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Evaluation of Cyantraniliprole Residues Translocated by Lettuce, Spinach and Radish

Yoon¹,

Lee²,

Lim³

et al. 2021

Korean Journal of Environmental Agriculture

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BACKGROUND: Cyantraniliprole is a systemic diamide insecticide that has been used to control lepidopteran pests in agriculture. Cyantraniliprole has become an issue due to its potentiality of unexpectable contamination in rotational crop cultivation. Thus, studies on the evaluation of cyantraniliprole translocated from soil into rotational crops are required. METHODS AND RESULTS: Cyantraniliprole was treated at a yearly maximum application level onto bare soil under greenhouse conditions in two geographically different regions. Lettuce was transplanted and spinach and radish were sown onto the soil 30 and 60 days-plant back intervals (PBIs) after cyantraniliprole treatment. The QuEChERS method was modified and coupled with LC/MS/MS analysis to determine the residues of cyantraniliprole in soil and plant samples. The methods for sample preparation and instrumental conditions were validated to meet the criteria of Codex guidelines and were successful to determine cyantraniliprole quantitatively and qualitatively in the samples. Cyantraniliprole residues in lettuce samples were 0.01 mg/kg for PBI 60 and 0.02 mg/kg for PBI 30, respectively.The residues in spinach samples were 0.01 mg/kg for PBI 60 and 0.01~0.02 mg/kg for PBI 30, respectively. Less than limit of the quantitation (LOQ) level (0.01 mg/kg) of cyantraniliprole was observed in radish samples. The residues in the plant samples were found as the levels less than maximum residue limit (MRL) for leafy and root vegetables. CONCLUSION(S): This study suggests PBI 30~60 days for rotational cultivation of lettuce, spinach and radish in greenhouse soil treated with cyantraniliprole at a yearly maximum application level.

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Plant Back Interval of Fluopyram Based on Primary Crop-derived Soil and Bare Soil Residues for Rotational Cultivation of Radish

Cited by 3 publications

References 14 publications

Uptake of Soil-Residual Diazinon by Rotational Lettuce under Greenhouse Conditions

Uptake of Soil-Residual Diazinon by Rotational Lettuce under Greenhouse Conditions

Dissipation Kinetics and Risk Assessment of Diniconazole, Dinotefuran, Metconazole, and Tebuconazole in Raphanus sativus L.

Evaluation of Cyantraniliprole Residues Translocated by Lettuce, Spinach and Radish

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