Establishment of Pre-Harvest Residue Limit of Fungicides Pyrimethanil and Trifloxystrobin during Cultivation of Persimmon

Lee, Chang Kyu; Kim, Yeong-Jin; Lee, So-Jung; Cho, Kyu-Song; Kim, Sang-Gon; Park, Min‐Ho; Kang, Kyu-Young

doi:10.5338/kjea.2012.31.1.45

Cited by 9 publications

(1 citation statement)

References 5 publications

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“…파프리카 증체율에 의한 시험 살충제의 희석효과농약의 작물잔류에 영향을 미치는 주요 인자로 과실의 비 대생장에 따른 희석효과를 들 수 있다(Lee et al, 2012). 시 험기간 중 파프리카의 평균 무게는 수확 초기부터 마지막까 지 순차적으로 증가하지 않았으며, 최소 176.9 g, 최대 191.5 g으로 6.5%의 적은 차이를 나타내었다.…”

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Residual Characteristics of Insecticides Used for Oriental Tobacco Budworm Control of Paprika

Lee¹,

Kim²,

Kim³

et al. 2013

Korean Journal of Environmental Agriculture

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BACKGROUND: This study was carried out to investigate the residual characteristics of insecticides used for Oriental Tobacco Budworm control and to establish the recommended pre-harvest residue limit leading to contribution in safety of paprika production. METHODS AND RESULTS: The recommended Pre-Harvest Residue Limits (PHRLs) of insecticides during cultivation of paprika were calculated from residue analyses of insecticides in fruits 1, 3, 5, 7, 10, 12, 15, 18 and 21 days after treatment. Paprika samples were extracted with QuEChERS method and cleaned-up with amino propyl SPE cartridge and PSA, and insecticide residues were analyzed either by HPLC/DAD or GLC/ECD. The limits of detection were 0.01 mg/kg for 5 insecticides. Average recoveries were 81.3±1.62%-98.3±1.58% of 5 insecticides at fortification levels of 0.1 and 0.5 mg/kg. The biological half-lives of the insecticides were 8.5 days for bifenthrin, 11.8 days for chlorantraniliprole, 16.8 days for chlorfenapyr, 7.1 days for lamda-cyhalothrin and 31.3 days for methoxyfenozide at recommended dosage, respectively. CONCLUSION(S): The pre-harvest residue limits for 10 days before harvest were recommended 1.05 mg/kg, 1.41 mg/kg, 0.93 mg/kg, 2.06 mg/kg and 1.08 mg/kg as bifenthrin, chlorantraniliprole, chlorfenapyr, lamda-cyhalothrin and methoxyfenozide, respectively. This study can provide good practical measures to produce safe paprika fruit by prevention of products from exceeding of MRLs at pre-harvest stage.

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Residual Characteristics of Insecticides Used for Oriental Tobacco Budworm Control of Paprika

Lee¹,

Kim²,

Kim³

et al. 2013

Korean Journal of Environmental Agriculture

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Chlorfenapyr Residue in Sweet Persimmon from Farm to Table

Jeong

Lee

Bae

et al. 2019

Journal of Food Protection

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The use of the pesticide chlorfenapyr has been increasing over time, with a consequent wider application to crops. However, there is limited information available on the amount and safety of the residues it leaves on crops. The amount of chlorfenapyr residues in sweet persimmon (Diospyros kaki L.) at both the pre- and postharvest stages were investigated in this study by calculating its biological half-life. The half-life at the preharvest stage was 8.8 days, shorter than that found during the storage periods at 4 and 20°C, when the half-lives were 11.0 and 23.9 days, respectively. In addition, peeling and washing after harvesting reduced residue content. The majority of the chlorfenapyr residues in sweet persimmon were found in the peel of the fruit, with the pulp containing less than 25% of the total. Thus, peeling effectively removed chlorfenapyr residues and diminished the residues below the limit of quantification in the pulp. In addition, washing with 1.0% alcohol and 0.2% Tween 20 solutions effectively removed 47.8 and 55.6% of the residues, respectively. Furthermore, a 1.0% alcohol solution showed high reduction efficiency for other hydrophobic pesticides, such as dimethomorph and fluquinconazole, up to 78.0%. Chlorfenapyr residues in sweet persimmon can be effectively reduced via storage or peeling and washing practices or a combination of them.

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Residual Characteristics of Lufenuron in Crown Daisy and Chamnamul for Establishing Pre-Harvest Residue Limit

Oh¹,

Ban²,

Chang³

2023

Korean Journal of Environmental Agriculture

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Pre-harvest residue limits (PHRLs) have been proposed as criteria for a proactive role to exceed the maximum residue limit (MRL) of pesticides in agricultural products at harvest. However, PHRL numbers are significantly less than those of established MRLs. This study was performed to determine the dissipation constants and residual concentrations of lufenuron after application on crown daisy and chamnamul under green house conditions. Two residue field trials for each crown daisy and chamnamul were selected to consider a different geographical site at least 20 km far from one another. The pesticide was treated according to critical GAP. After samples were sprayed with lufenuron, they were collected at 0, 1, 3, 5, 7, 10, and 14 days and analyzed using HPLC-DAD. The mean recoveries of crown daisy and chamnamul were within the range of 70-120% with below 20% coefficient variation, which is within the acceptable limits specified by the manual of pre-harvest residue study for pesticides (MFDS, 2014). The biological half-lives in field I and field II were 7.0 and 4.6 days for crown daisy and 2.7 and 2.8 days for chamna-mul, respectively. The lower bounds of 95% confidence intervals of dissipation rate constants of lufenuron in crown daisy were determined to be 0.0692 and 0.1298 for field I and field II, respectively, and in chamnamul were 0.2067 for both field I and field II. After applying lufenuron 5% EC, the lufenuron residues on crown daisy and chamnamul at the pre-harvest intervals (14 days for crown daisy and 7 days for chamnamul) were below the safe levels. The dissipation rates of lufenuron in crown daisy and chamnamul were evaluated for similarities with leafy vegetables based on a 95% confidence interval.

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Establishment of Pre-Harvest Residue Limit of Fungicides Pyrimethanil and Trifloxystrobin during Cultivation of Persimmon

Cited by 9 publications

References 5 publications

Residual Characteristics of Insecticides Used for Oriental Tobacco Budworm Control of Paprika

Residual Characteristics of Insecticides Used for Oriental Tobacco Budworm Control of Paprika

Chlorfenapyr Residue in Sweet Persimmon from Farm to Table

Residual Characteristics of Lufenuron in Crown Daisy and Chamnamul for Establishing Pre-Harvest Residue Limit

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