Degradation of difenoconazole in water and soil: Kinetics, degradation pathways, transformation products identification and ecotoxicity assessment

Man, Yanli; Stenrød, Marianne; Wu, Chi; Almvik, Marit; Holten, Roger; Clarke, Jihong Liu; Yuan, Shankui; Wu, Xiaohu; Xu, Jun; Dong, Fengshou; Zheng, Yongquan; Liu, Xingang

doi:10.1016/j.jhazmat.2021.126303

Cited by 60 publications

(18 citation statements)

References 48 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Semi-field experiments performed in Sweden and the Netherlands show chronic toxic effects of azoxystrobin at concentrations that are an order of magnitude lower than the TWACs calculated in this study, with copepods and some Cladocera showing the largest abundance declines (Gustafsson et al, 2010; van Wijngaarden et al, 2014). Difenoconazole has proven to be very toxic to daphnids (Moreira et al ., 2020), fish and algae (Man et al ., 2021) in other ecosystems impacted by rice production (Shen et al ., 2022). On the other hand, MCPA is relatively toxic to eelgrass and dicotyledonous aquatic plants (Nielsen & Dahllöf, 2007), and has been highlighted as one of the most toxic compounds in other rice production areas such as the Ebro Delta in Spain (Barbieri et al ., 2020).…”

Section: Resultsmentioning

confidence: 99%

A Bayesian network approach to assess the influence of climate change and pesticide use practices on the ecological risks of pesticides in a protected Mediterranean wetland

Martínez‐Megías

Mentzel

Fuentes-Edfuf

et al. 2022

Preprint

View full text Add to dashboard Cite

Pollution by agricultural pesticides is one of the most important pressures affecting Mediterranean coastal wetlands. Pesticide risks are expected to be influenced by climate change, which will result in an increase of temperatures and a decrease in annual precipitation rates in this region. On the other hand, pesticide dosages are expected to change given the increase in pest resistance and the implementation of environmental policies like the European Farm-to-Fork strategy, which aims for a 50% reduction in pesticide usage by 2030. The influence of climate change and pesticide use practices on the ecological risks of pesticides needs to be evaluated making use of realistic environmental scenarios. This study aimed to assess how different climate change and pesticide use practices affect the ecological risks of pesticides in the Albufera Natural Park (Valencia, Spain), a protected Mediterranean coastal wetland. We performed a probabilistic risk assessment for nine pesticides applied in rice production using scenarios comprised of three climatic regimes (the 2008 record, and projections for 2050 and 2100), three pesticide application regimes (the recommended dose, and 50% increase and 50% decrease), and their combinations. The scenarios were used to simulate pesticide exposure concentrations in the water column of the rice paddies using the RICEWQ model. Pesticide effects were characterized using acute and chronic Species Sensitivity Distributions built with laboratory toxicity data for aquatic organisms. Risk quotients were calculated as probability distributions making use of a Bayesian network approach, and best fitting distributions for the calculated exposure data and the SSDs. Our results show that future climate projections will influence exposure concentrations for some of the studied pesticides, yielding higher dissipation and lower exposure in scenarios dominated by an increase of temperatures, and higher exposure for scenarios in which heavy precipitation events occur after pesticide application. Our case study shows that pesticides such as azoxystrobin, difenoconazole and MCPA are posing high ecological risks for aquatic organisms, and that the implementation of the Farm-to-Fork strategy is crucial to reduce them, although will need additional measures to eliminate them.

show abstract

Section: Resultsmentioning

confidence: 99%

A Bayesian network approach to assess the influence of climate change and pesticide use practices on the ecological risks of pesticides in a protected Mediterranean wetland

Martínez‐Megías

Mentzel

Fuentes-Edfuf

et al. 2022

Preprint

View full text Add to dashboard Cite

show abstract

“…All buffer solutions (pH 4, 7, and 9) were prepared with distilled water obtained from Watsons Co., Ltd, as previously described. 22 Buffer solutions and glass apparatuses were sterilized by autoclaving for 40 min at 120 °C to avoid microbial degradation. The pH of each solution was measured and calibrated prior to the experiments.…”

Section: Methodsmentioning

confidence: 99%

“…As the emission spectra of a xenon lamp is similar to that of sunlight, it was used as the light source. 22 UPLC-HRMS was employed for the qualitative and quantitative analyses of pyridaben and its photolysis products. The effects of pH, HA, FA, nitrates, and Fe( iii ) on the kinetics of photolysis pyridaben and its photolysis products were investigated.…”

Section: Introductionmentioning

confidence: 99%

“…19,20 The photolysis of a pesticide in an aqueous environment depends on its properties and the physicochemical characteristics of natural waterbodies. [21][22][23] In addition, the photolysis of a pesticide depends on its interactions with natural soluble substances such as humic acids (HA), fulvic acids (FA), nitrates, and Fe(III) ions. 19,24 Therefore, it is essential to understand the photolytic fate of a pesticide in the aqueous environment to evaluate the effects of its application and develop guidelines for its rational use.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Kinetics of the photolysis of pyridaben and its main photoproduct in aqueous environments under simulated solar irradiation

Pan

et al. 2022

RSC Adv.

View full text Add to dashboard Cite

show abstract

“…In many cases, these transformation products have unknown effects on the environment [ 7 ], are known to cause loss of species [ 7 ], or have been classified as carcinogenic, neurotoxic, and teratogenic [ 8 ]. Some authors, such as Man et al [ 9 ], found that photodegradation products of difenoconazole are toxic for fish but not for crustaceans. Klementová et al [ 3 ] reported no toxicity of the combined photodegraded products of atrazine on aquatic plants, while crustaceans only suffered toxic effects after long-term exposure to atrazine.…”

Section: Introductionmentioning

confidence: 99%

Toxicity of Difenoconazole and Atrazine and Their Photodegradation Products on Aquatic Biota: Environmental Implications in Countries Lacking Good Agricultural Practices

Herrera

Iñiguez–Armijos

Alcarria

et al. 2023

Toxics

View full text Add to dashboard Cite

Agriculture is fundamental for human development, but it may also have a range of unwanted effects on ecosystems when pesticides inadvertently enter the environment. We determined the toxicity of difenoconazole and atrazine, as well as their photodegradation products, on the bioindicators Lemna minor and Daphnia magna. For L. minor, we assessed the number of leaves, biomass, and chlorophyll content exposed to different concentrations of difenoconazole (0–8 mg/L) and atrazine (0–3.84 mg/L). For D. magna, we assessed the mortality to difenoconazole (0–1.6 mg/L) and atrazine (0–80 mg/L). We found that the higher the concentrations of the pesticides, the higher the toxicity for both bioindicators. In L. minor, the highest toxicity for atrazine was 0.96 mg/L, whereas for difenoconazole, it was 8 mg/L. For D. magna, the 48 h LC50 for difenoconazole was 0.97 mg/L, while for atrazine, it was 86.19 mg/L. For L. minor, the toxicity of difenoconazole and atrazine was not different compared to that of their photodegradation products. In contrast, for D. magna, difenoconazole, but not atrazine, was more toxic compared to its respective photodegradation products. Pesticides are a serious threat to aquatic biota, and their photodegradation products remain toxic in the environment. Additionally, the use of bioindicators can help monitor these pollutants in aquatic ecosystems in countries where the application of pesticides is imperative for agricultural production.

show abstract

Degradation of difenoconazole in water and soil: Kinetics, degradation pathways, transformation products identification and ecotoxicity assessment

Cited by 60 publications

References 48 publications

A Bayesian network approach to assess the influence of climate change and pesticide use practices on the ecological risks of pesticides in a protected Mediterranean wetland

A Bayesian network approach to assess the influence of climate change and pesticide use practices on the ecological risks of pesticides in a protected Mediterranean wetland

Kinetics of the photolysis of pyridaben and its main photoproduct in aqueous environments under simulated solar irradiation

Toxicity of Difenoconazole and Atrazine and Their Photodegradation Products on Aquatic Biota: Environmental Implications in Countries Lacking Good Agricultural Practices

Contact Info

Product

Resources

About