Dissipation and distribution of difenoconazole in bananas and a risk assessment of dietary intake

Zheng, Qun; Qin, Deqiang; Yang, Liupeng; Liu, Benju; Lin, Sukun; Ma, Qianli; Zhang, Zhixiang

doi:10.1007/s11356-020-08030-w

Cited by 20 publications

(5 citation statements)

References 26 publications

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“…Subsequently, the accuracy and precision were evaluated by measuring the spike recoveries at various levels in a complex matrix and relative standard deviation (RSD) of ve duplicate samples. The limit of detection (LOD mg/kg) was determined to be the lowest concentration with a response that was three times the baseline noise standard deviation de ned by the three control sample analyses (Zheng et al, 2020;Zhang et al, 2015).…”

Section: Methods Validationmentioning

confidence: 99%

Dissipation and residue of fosthiazate in tomato and cherry tomato and a risk assessment of dietary intake

Lin

et al. 2021

Environ Sci Pollut Res

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In this study, the safety and risk of fosthiazate as a nematicide against root-knot nematode in tomato and cherry tomato were evaluated. The dissipation and residue of fosthiazate for 28 days in tomato and cherry tomato were determined and studied by HPLC after simple, rapid pre-treatment. The mean recovery was 83.79 ~ 94.18%, and the relative standard deviation was 3.97 ~ 7.40%. Results showed that the halflives of fosthiazate in tomato (4.81 ~ 5.37 days) were signi cantly lower than that in cherry tomato (5.25 5.73 days). At the pre-harvest interval (PHI) of 21 days, the residues of tomatoes and cherry tomatoes were 0.032 ~ 0.046 mg/kg, which were lower than the maximum residue level established in China. The potential risks of fosthiazate exposure through the dietary intake of tomatoes and cherry tomatoes to different populations were also studied. According to the results of dietary risk assessment, the residual levels of fosthiazate were within the acceptable range of long-term dietary risk in different populations in China within the sampling interval of 21 days after the application of pesticide. Our results show that fosthiazate as a nematicide in the eld control of root-knot nematode has high safety and low risk, and can provide a reference for the safe and reasonable use of fosthiazate as a nematicidein in the eld.

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Section: Methods Validationmentioning

confidence: 99%

Dissipation and residue of fosthiazate in tomato and cherry tomato and a risk assessment of dietary intake

Lin

et al. 2021

Environ Sci Pollut Res

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“…In this study, difenoconazole (10%) was found to be the most effective fungicide against leaf diseases caused by R. sphaeroidea. The terminal residues of difenoconazole in whole bananas and pulp were 0.45~0.84 mg/kg and 0.19~0.37 mg/kg, respectively, which were lower than the maximum residue level established in China [60].…”

Section: Discussionmentioning

confidence: 60%

Evaluation of the Growth, Sporulation, Fungicide Efficacy, and Host Range of Ramularia sphaeroidea

Shi,

2024

Microorganisms

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Ramularia sphaeroidea was primarily identified based on the characteristics of its conidia and several sequences. The fungus causes severe leaf spot disease on hairy vetch (Vicia villosa var. glabrescens) in Yunnan Province in China. The growth, sporulation, fungicide efficacy, and host range of the pathogen were evaluated to aid in disease management. Different types of culture media and carbon and nitrogen sources were used to evaluate the growth of R. sphaeroidea. Oatmeal, maltose, and potassium nitrate agar had a higher amount of sporulation. Difenoconazole (10%) was the most effective fungicide against the leaf disease caused by R. sphaeroidea. In addition, foliar inoculation sprays were used to assess the host range of R. sphaeroidea in six different plant species, including alfalfa (Medicago sativa L.), sainfoin (Onobrychis viciifolia Scop.), erect milkvetch (Astragalus adsurgens Pall.), common vetch (Vicia sativa L.), red clover (Trifolium pratense L.), and white clover (Trifolium repens L.). R. sphaeroidea successfully infected these plants, indicating that it has a wider host range than hairy vetches.

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“…The different half‐lives of thiamethoxam in Bole and Kashgar may have been caused by differences in soil properties and climate (such as soil pH, humidity and temperature), which would affect the degradation of the pesticide 45,46 . The half‐life of thiamethoxam was shorter in the leaves and stems than in the soil and roots, mainly because aboveground plant parts are subject to more variable environmental factors (such as sunlight, temperature, humidity and rain) and because their metabolism makes thiamethoxam dissipate more rapidly 47 …”

Section: Resultsmentioning

confidence: 99%

“…In Bole and Kashgar, the dissipation half-lives of thiamethoxam in various parts of maize plants and soil were 45,46 The half-life of thiamethoxam was shorter in the leaves and stems than in the soil and roots, mainly because aboveground plant parts are subject to more variable environmental factors (such as sunlight, temperature, humidity and rain) and because their metabolism makes thiamethoxam dissipate more rapidly. 47 3.7 Terminal residues of thiamethoxam in various parts of maize plants and soil Representative samples were collected from different parts of maize plants in Bole and Kashgar during harvest to determine the terminal residue levels of thiamethoxam (Table 1). Thiamethoxam was not detected in all parts of the maize in the spray treatment during harvest.…”

Section: Dissipation Dynamics Of Thiamethoxam In Different Parts Of M...mentioning

confidence: 99%

Efficacy of drip irrigation with thiamethoxam on control of Monolepta hieroglyphica, and uptake, translocation and dietary risk of thiamethoxam in maize

Yan

Zheng

Yang

et al. 2023

Pest Management Science

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BACKGROUNDMonolepta hieroglyphica (Motschulsky) is an important agricultural pest that causes significant economic losses in terms of crop production. Conventional pesticide spraying treatments can result in pesticide drift, endanger nontarget organisms, and cause pests to fly away, resulting in unsatisfactory prevention and control effects. To study the effect of thiamethoxam on the control of maize M. hieroglyphica, a field experiment was conducted to determine the optimal thiamethoxam application dose, its spatial and temporal distribution dynamics and its dietary risk based on its control effect when applied by spray and drip irrigation.RESULTSThe results of the field trials showed that compared with spray irrigation, drip irrigation resulted in greater control starting from the 5th day. This result was due to the hysteresis effect of thiamethoxam being first absorbed by the roots and then continuously transferred upward, where it accumulates. After 30 days of drip irrigation with 75 and 150 g a.i. ha‐1 thiamethoxam, the control effect on M. hieroglyphica was 32.41‐49.44% and 69.77‐80.57%, respectively. The results of the dietary risk assessment showed that the risk of thiamethoxam ingestion through maize kernels was acceptable regarding its effect on human health.CONCLUSIONSDrip irrigation with thiamethoxam can improve the effective utilization rate of pesticides, achieve precise control of maize M. hieroglyphica, and provide a new method for sustainable agricultural production.This article is protected by copyright. All rights reserved.

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Dissipation and distribution of difenoconazole in bananas and a risk assessment of dietary intake

Cited by 20 publications

References 26 publications

Dissipation and residue of fosthiazate in tomato and cherry tomato and a risk assessment of dietary intake

Dissipation and residue of fosthiazate in tomato and cherry tomato and a risk assessment of dietary intake

Evaluation of the Growth, Sporulation, Fungicide Efficacy, and Host Range of Ramularia sphaeroidea

Efficacy of drip irrigation with thiamethoxam on control of Monolepta hieroglyphica, and uptake, translocation and dietary risk of thiamethoxam in maize

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