Deposition distribution, metabolism characteristics, and reduced application dose of difenoconazole in the open field and greenhouse pepper ecosystem

Chen, Shiyu; Cai, Lin; Zhang, Houpu; Zhang, Qianke; Song, Jiajin; Zhang, Zihan; Deng, Yanfei; Liu, Yalei; Wang, Xiuguo; Fang, Hua

doi:10.1016/j.agee.2021.107370

Cited by 24 publications

(11 citation statements)

References 36 publications

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“…Several studies have confirmed the effects of environmental factors on the persistence of pesticide residues in crops ( Allen et al, 2015 , Fantke and Juraske, 2013 , Yang et al, 2022 ). Several other studies also found higher pesticide residues in protected environments than in open-field conditions ( Buddidathi et al, 2016 , Chen et al, 2021 , Tang et al, 2021 , Yang et al, 2022 ). Moreover, evidence from our study suggested that all surveyed fungicides accumulated in greenhouse and open-field cowpeas after repeated spraying.…”

Section: Discussionmentioning

confidence: 70%

Dissipation, accumulation, distribution and risk assessment of fungicides in greenhouse and open-field cowpeas

Cui,

Ma,

Zhao

et al. 2024

Food Chemistry: X

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Section: Discussionmentioning

confidence: 70%

Dissipation, accumulation, distribution and risk assessment of fungicides in greenhouse and open-field cowpeas

Cui,

Ma,

Zhao

et al. 2024

Food Chemistry: X

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“…The residual concentrations of pesticides in crops are affected by crop varieties, application doses, application frequencies, initial deposition and weather during the experimental period. The residues of pesticides are proportionate to the application doses and application frequencies but inversely proportional to rainfall, temperatures and initial deposition (Chen et al, 2021; Fantke et al, 2014). The precipitation in Heilongjiang, Shanxi and Hunan was much more than the other nine sites, and Shanxi and Guizhou posed much higher temperatures than the other 10 locations (Table 1), resulting in lower residual amounts.…”

Section: Resultsmentioning

confidence: 99%

Residue levels and risk assessment of acetamiprid–pyridaben mixtures in cabbage under various open field conditions

Dong,

2023

Biomedical Chromatography

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Acetamiprid and pyridaben are highly efficient insecticides widely used to protect leafy vegetables against various pests, such as Phyllotreta striolata, but analyses of their residual behaviors applied in mixtures in cabbage fields are primarily lacking. Herein, field trials were performed by spraying 50% acetamiprid–pyridaben wettable powder (50% WP) once at a dose of 150 g of active ingredient per hectare in 12 representative provinces of China under Good Agricultural Practices. The residues of acetamiprid and pyridaben were detected using modified Quick, Easy, Cheap, Effective, Rugged, and Safe (QuEChERS) and liquid chromatography–tandem mass spectrometry, together with an assessment of their dietary risks. The average recoveries of the two insecticides were 84.6–104%, and the relative standard deviations were 0.898–10.1%. The residual concentrations of acetamiprid and pyridaben at the preharvest interval of 7 days were <0.364 and 0.972 mg/kg, respectively, and less than their maximum residue limits in cabbage (0.5 mg/kg for acetamiprid and 2 mg/kg for pyridaben) in China. The chronic and acute risk values of acetamiprid and pyridaben were 0.0787–33.3%, implying acceptable health hazards to Chinese consumers. In conclusion, applying 50% WP in cabbage fields under Good Agricultural Practices is acceptable. These results provide essential data for using mixtures of acetamiprid and pyridaben in cabbage fields.

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“…What is clear is that Method 2 is a better method. This may be because MWCNTs-NH 2 contains more amino groups than MWCNTs-OH (Chen S. et al, 2021), which can additionally adsorb more acidic substances and ensure a more stable pretreatment method. It has been reported that the higher number of nitrogen atoms in MWCNT-NH 2 can form hydrogen bonds with the hydrogen atoms in other interfering substances and thus adsorb more interfering substances (Yu et al, 2020).…”

Section: Optimizing the Adsorbentmentioning

confidence: 99%

Residue behavior and dietary risk assessment of fluopyram in cowpea and determination in nine foodstuffs

Ren

Zhang

et al. 2023

Front. Environ. Sci.

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Pesticide residues have been one of the food safety problems that plague consumers. It is necessary to develop validated detection methods to monitor pesticide residues in food. In this study, fluopyram was analyzed in fruits (banana, grape, and citrus) and vegetables (tomato, cucumber, cowpea, pepper, eggplant, and potato) by optimizing the QuEChERS in combination with GC-MS/MS. The recoveries of fluopyram in all food matrices ranged from 87.02% to 101.42% with RSD below 9.25%. The matrix effect of fluopyram ranging from −1.41% to 17.67%. Finally, this market investigation resulted in a total of 19 positive samples out of 128 market samples, all of which fell below the MRL with the exception of one tomato sample, which was above the EU MRL. Field trial of fluopyram on cowpea was conducted, the half-lives of fluopyram was 3.03–3.95 days, terminal residues ranged from .031–.596 mg/kg. Dietary risk assessment was performed on cowpea. The result indicates that the dietary risk of fluopyram in cowpeas is acceptable. The method of detection developed in this study could enable better monitoring of fluopyram residues in foodstuffs.

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Deposition distribution, metabolism characteristics, and reduced application dose of difenoconazole in the open field and greenhouse pepper ecosystem

Cited by 24 publications

References 36 publications

Dissipation, accumulation, distribution and risk assessment of fungicides in greenhouse and open-field cowpeas

Dissipation, accumulation, distribution and risk assessment of fungicides in greenhouse and open-field cowpeas

Residue levels and risk assessment of acetamiprid–pyridaben mixtures in cabbage under various open field conditions

Residue behavior and dietary risk assessment of fluopyram in cowpea and determination in nine foodstuffs

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