Persistence and dissipation of fluopyram and tebuconazole on bell pepper and soil under different environmental conditions

Matadha, Nagapooja Yogendraiah; Mohapatra, Soudamini; Siddamallaiah, Lekha; Udupi, Veena Rao; Gadigeppa, Shambulinga; Raja, Danish Poothotathil; Donagar, Shruti Prakash; Hebbar, S. S.

doi:10.1080/03067319.2019.1704745

Cited by 14 publications

(7 citation statements)

References 32 publications

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“…In chili peppers, Saha et al ( 2016 ) showed a half-life of 1.2 and 1.2 days for a single (100 g/ha) and a double dose (200 g/ha), respectively. In bell pepper fruit, the demonstrated half-life was 7.3 days (Yogendraiah Matadha et al 2021 ). Dong and Hu ( 2014 ) showed that the half-life after fluopyram application in watermelon crops amounted to 6.48–6.60 days.…”

Section: Discussionmentioning

confidence: 99%

“…Also, Sahoo et al ( 2012 ) obtained a half-life of 1 day in the same crop. In other crops, the value of the half-life was 6 and 3–3.8 days in mango (Mohapatra 2015 ; Mohapatra et al 2018 , respectively), 5.87–6.93 days in the watermelon (Dong and Hu 2014 ), 4.49 days in ginseng (Wang et al 2015a ), 0.9 days in tomato (Singh and Singh 2014 ), 2.8 days in strawberries (Wang et al 2015b ), 11.97 days in pepper (Fenoll et al 2009 ), and 6.1 and 7.2 days in bell pepper leaves (Yogendraiah Matadha et al 2021 ).…”

Section: Discussionmentioning

confidence: 99%

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Effect of microorganisms on degradation of fluopyram and tebuconazole in laboratory and field studies

Podbielska

Kus‐Liśkiewicz

Jagusztyn

et al. 2023

Environ Sci Pollut Res

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Nowadays, chemical pesticides are the most widespread measure used to control crop pests and diseases. However, their negative side effects prompted the researchers to search for alternative options that were safer for the environment and people. Pesticide biodegradation by microorganisms seems to be the most reasonable alternative. The aim of the laboratory studies was to assess the influence of Bacillus subtilis and Trichoderma harzianum, used separately and combined together, on fluopyram and tebuconazole degradation. In field studies, the degradation of fluopyram and tebuconazole after the application of the biological preparation in apples was investigated. The results from the laboratory studies show that the greatest decomposition of fluopyram and tebuconazole was observed in tests with T. harzianum in a range of 74.3–81.5% and 44.5–49.2%, respectively. The effectiveness of fluopyram degradation by B. subtilis was 7.5%, while tebuconazole inhibited bacterial cell growth and no degradation was observed. The mixture of microorganisms affected the degradation of fluopyram in a range of 8.3–24.1% and tebuconazole in a range of 6.1–23.3%. The results from the field studies show that degradation increased from 3.1 to 30.8% for fluopyram and from 0.4 to 14.3% for tebuconazole when compared to control samples. The first-order kinetics models were used to simulate the residue dissipation in apples. For the determination of pesticide residues, the QuEChERS method for apple sample preparation was performed, followed by GC–MS/MS technique. Immediately after the treatments, the maximum residue level (MRL) values for tebuconazole were exceeded, and it was equal to 100.7% MRL for the Red Jonaprince variety and 132.3% MRL for the Gala variety. Thus, preharvest time is recommended to obtain apples in which the concentration of pesticides is below the MRL and which can be recognized as safe for humans.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Effect of microorganisms on degradation of fluopyram and tebuconazole in laboratory and field studies

Podbielska

Kus‐Liśkiewicz

Jagusztyn

et al. 2023

Environ Sci Pollut Res

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“…Indeed, perilla leaves have a shorter half-life compared to radish leaves. The half-life of TBC was predicted to have a geometric mean half-life of 7.67 days [21], 9.4-9.9 days in green onion leaves [26], 5.11-7.22 days in ginseng leaves [27], 1.85-2.46 days in wheat leaves [28], 2.22-2.23 days in spinach leaves [29], 6.4 days in perilla leaves [25], and 11.6-25.3 days in bell pepper leaves [30]. In the case of roots, the biological half-life of TBC in ginseng was 4.59-5.46 days [27].…”

Section: Residual Characteristics Of Pesticides In Radish Leaf and Rootmentioning

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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“…Tebuconazole, 1-(4-chlorophenyl)-4,4-dimethyl-3-(1,2,4-triazol-1ylmethyl)pentan-3-ol is a broad-spectrum fungicide that inhibits demethylation synthesis in the fungal cell membrane, and its co-formulation with fluopyram could provide several advantages, such as higher efficacy and a lower risk of pathogens developing a resistance to fungicides [3]. The co-formulation of fluopyram and tebuconazole has protective, curative, and eradicative properties against the fungal pathogens of a number of fruit and vegetable crops and has recently been registered for the effective control of powdery mildew and anthracnose in chilli and grape [5,6].…”

Section: Introductionmentioning

confidence: 99%

“…However, tebuconazole is considered moderately or highly persistent with DT 50 values in soils of 25.8-91.6 days and >365 days under field or laboratory conditions, respectively [7,8]. In fact, residues of both fungicides have been detected in soils following their application in different crops across numerous countries [6,9]. Despite this high persistence, both fungicides have also been detected in surface water and groundwater when they have been included in different monitoring studies worldwide [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Effect of Applying an Organic Amendment on the Persistence of Tebuconazole and Fluopyram in Vineyard Soils

et al. 2023

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The persistence of fluopyram and tebuconazole has been studied in different crops and agricultural soils. However, the behaviour of these fungicides may be altered when they are applied as a combined formulation in organically amended vineyard soils under field conditions. The purpose of this study is to evaluate the effect of applying spent mushroom substrate (SMS) or this residue re-composted with ophite (SMS + OF) on the adsorption, dissipation, and mobility of the fungicides fluopyram and tebuconazole in vineyard soils. Triplicate 10 m2 plots per treatment were set up in two different vineyard soils in the eastern La Rioja region: silt loam (ARN1) and sandy loam (ARN2), respectively, with low organic carbon (OC) content. The organic residues SMS and SMS + OF were applied at doses of 25 and 100 Mg ha−1. The adsorption distribution coefficients (Kd) increased when SMS and SMS + OF were applied, especially at the higher dose (100 Mg ha−1). The dissipation curve of both compounds fitted a two-phase kinetic model, with a very fast initial dissipation rate, followed by slower prolonged dissipation during the second phase. The dissipation half-lives (DT50) ranged between 4.7 and 26.3 days for fluopyram and between 2.3 and 6.3 days for tebuconazole in the different soils, increasing for fluopyram in the ARN1 amended with SMS and SMS + OF. The fungicide residues at 15–30 cm depth were lower in the unamended and amended sandy loam soil (ARN2), indicating that fungicides are dissipated mainly in the topsoil. The results indicate different dissipation mechanisms for both fungicides, as the adsorption by soil OC prevented the dissipation of fluopyram but facilitated the dissipation of tebuconazole, probably due to the formation of non-extractable residues.

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Persistence and dissipation of fluopyram and tebuconazole on bell pepper and soil under different environmental conditions

Cited by 14 publications

References 32 publications

Effect of microorganisms on degradation of fluopyram and tebuconazole in laboratory and field studies

Effect of microorganisms on degradation of fluopyram and tebuconazole in laboratory and field studies

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

Effect of Applying an Organic Amendment on the Persistence of Tebuconazole and Fluopyram in Vineyard Soils

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