Evaluation of thiobencarb runoff from rice farming practices in a California watershed using an integrated RiceWQ-AnnAGNPS system

Wang, Ruoyu; Bingner, Ronald L.; Yuan, Yongping; Locke, Martin A.; Herring, Glenn; Denton, Debra L.; Zhang, Minghua

doi:10.1016/j.scitotenv.2020.144898

Cited by 7 publications

(2 citation statements)

References 55 publications

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“…Among the total agricultural chemical expenditures in Malaysia, herbicides accounted for 70% (Tey et al 2014;Foguesatto and Machado 2022;López-Felices et al 2023), followed by insecticides (19%), fungicides (7% ) and rodenticides (5%) (Shamsudin et al 2010;Srivastava 2020). Malaysia's primary food crop is rice, and around 70% of pesticides are exclusively used in paddy fields (Bhattacharjee et al 2012;Wang et al 2021).…”

Section: Introductionmentioning

confidence: 99%

A Study of the Photodegradation Carbofuran and its Metabolites in Paddy Water Samples

Baharudin

Ahmad

2023

J Exp Bio & Ag Sci

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Rice fields are one of the agricultural sectors in Malaysia that are heavily pesticide-treated. This study aimed to determine how carbofuran degrades in paddy water and how carbofuran metabolites such as carbofuran-phenol and 3-keto carbofuran reacted during the degradation. The experiment was conducted in two distinct conditions: the first water sample was exposed to sunlight, while the second water sample remained in the dark. During the 56 days of observation, the study discovered carbofuran decomposed slowly in both conditions. The water sample exposed to sunlight showed a faster degradation rate (0.04/day carbofuran) than the water kept in the dark (0.0186/day). The results also demonstrated that photolysis and hydrolysis enhanced the carbofuran degradation in the water. Both 3-keto carbofuran and carbofuran-phenol were detected as metabolites with low concentration levels, ranging from 0.03±0.301 to 0.23±0.142 ppm. These metabolites are considered 'emerging pollutants' as they can be detected in the environment and may post-treat as much as the parent compounds themselves. Hence, this study is trying to fill the research gap to assess the route and rate of carbofuran and its transformation products.

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Section: Introductionmentioning

confidence: 99%

A Study of the Photodegradation Carbofuran and its Metabolites in Paddy Water Samples

Baharudin

Ahmad

2023

J Exp Bio & Ag Sci

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“…Pesticides are chemicals used to prevent, eliminate, destroy or minimise pests such as insects, animals, fungi, and plants (Hijosa-Valsero et al 2016; Khalid et al 2020). Around 70% of pesticides are used exclusively on paddy elds, as rice is the primary food crop in Malaysia (Bhattacharjee et al 2012; Wang et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Photodegradation of Carbofuran in Paddy Water Samples

Baharudin

Ahmad

2022

Preprint

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Rice fields are one of the agricultural sectors in Malaysia that are heavily pesticide-treated. This study aimed to determine how carbofuran degrades in paddy water and what happens to its metabolite products, carbofuran phenol, and 3-ketocarbofuran. The experiment was conducted in two distinct ways, with one water sample being exposed to sunshine and the other remaining in the dark. Within 56 days of observation, the study discovered that carbofuran decomposed very slowly in all conditions. The water sample exposed to sunlight showed a faster degradation rate, 0.04 day-1, compared to the water kept in the dark at 0.0186 day-1. The results also demonstrated that photolysis and hydrolysis enhance the degradation of the carbofuran in the water. Both 3-ketocarbofuran and carbofuran–phenol was detected as metabolites with low concentration levels, ranging from 0.03 to 0.23 ppm. These metabolites are considered 'emerging pollutants' as they can be detected in the environment and may post-treat as much as the parent compounds themselves. Hence, this study is trying to fill in the research gap to assess the route and rate of carbofuran and its transformation products.

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Improved export coefficients enhanced export coefficient model’s accuracy in assessing agricultural non-point pollution: a Jialing River Basin study

Wang,

Zhang,

2024

Environ Earth Sci

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Evaluation of thiobencarb runoff from rice farming practices in a California watershed using an integrated RiceWQ-AnnAGNPS system

Cited by 7 publications

References 55 publications

A Study of the Photodegradation Carbofuran and its Metabolites in Paddy Water Samples

A Study of the Photodegradation Carbofuran and its Metabolites in Paddy Water Samples

Photodegradation of Carbofuran in Paddy Water Samples

Improved export coefficients enhanced export coefficient model’s accuracy in assessing agricultural non-point pollution: a Jialing River Basin study

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