Pesticide Dissipation and Fate in Agricultural Settings

Wauchope, R. Don

doi:10.1002/9780891183860.ch7

Cited by 3 publications

(3 citation statements)

References 258 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, estimating the risk of contamination of non-target species tends to be imprecise because the way in which pesticides are actually used in agriculture often tends not to reflect reality. Lethal bee contamination can occur due to incorrect and unrecommended application of pesticides (Wauchope, 2022).…”

Section: Beesmentioning

confidence: 99%

“…The criteria that are used for calculating critical doses in bee toxicology studies may not reflect the reality in the field. Concentrations of pesticides that are considered environmentally relevant are determined from observed doses in samples of bees and contaminated bee products; however, farmers may not always faithfully follow the agronomic recommendations for pesticide application, adopting pesticide doses and application methods different from those recommended by agronomists (Straw et al, 2023;Wauchope, 2022).…”

Section: Beesmentioning

confidence: 99%

See 1 more Smart Citation

Contact exposure of honey bees and social stingless bees to fungicide sprayed on cotton and soybean in a controlled field simulation system

Freitas,

Kato,

Gomes

et al. 2024

J Applied Entomology

View full text Add to dashboard Cite

Bees can be exposed to pesticides when visiting crops or plants in adjacent areas affected by spray drift. Among pesticide categories, fungicides tend to be considered relatively safe, though they also can negatively affect pollinators. Most evidence of damage by fungicides to bees comes from laboratory tests; there is little information concerning contamination levels in the field. We examined exposure of honey bees (Apis mellifera L.) (Hymenoptera: Apidae) and a common Brazilian native species of social stingless bees (Scaptotrigona postica Latreille; Hymenoptera: Apidae), which is about a third the size of a honey bee, to a commercial fungicide (Fox Xpro), with three active ingredients (trifloxystrobin, bixafen, and prothioconazole), applied to crops they often visit according to label directions. A spraying apparatus mounted on tracks in a laboratory spray room was used to simulate field conditions. Soybean and cotton plants grown in pots were transferred to the spray room when the plants were in flower. Anaesthetized bees were attached with insect pins at the top and middle of the plants, on leaves and flowers. The fungicide was applied using fine or coarse droplets. The amounts of the individual active ingredients absorbed by bees were then quantified. Concentrations of trifloxystrobin were highest in both honey bees and stingless bees, followed by bixafen, and then prothioconazole, which was detected in the bees at much lower levels. Overall, bees at the top of the plants and those sprayed with fine droplets absorbed more pesticide. As a function of body mass, the stingless bees were more heavily contaminated than the larger honey bees. Tests using spraying systems that simulate field conditions can better estimate the actual doses that contaminate bees to help determine the impact of fungicides and other pesticides applied to crops.

show abstract

Section: Beesmentioning

confidence: 99%

Section: Beesmentioning

confidence: 99%

Contact exposure of honey bees and social stingless bees to fungicide sprayed on cotton and soybean in a controlled field simulation system

Freitas,

Kato,

Gomes

et al. 2024

J Applied Entomology

View full text Add to dashboard Cite

show abstract

“…Pesticide usage plays a crucial role in modern agriculture, enhancing crop yields and ensuring food security worldwide. − The widespread use of pesticides raises concerns regarding environmental contamination, ecosystem disruption, and risks to human health. , Achieving a delicate balance between agricultural productivity, ecological preservation, and human safety requires a comprehensive understanding of pesticide dynamics in the environmental systems where food supplies are grown. − A critical issue involves collecting sufficient and comprehensive environmental data to establish baselines of pesticide presence and concentrations, allowing comparisons with risk thresholds in both agricultural soils and water systems that interact with them. , This issue is particularly challenging in resource-limited areas, including many developing nations, many of which lack a long history of addressing environmental preservation through effective policies and best management practices. ,, …”

Section: Introductionmentioning

confidence: 99%

Riverine Pesticides in an Agricultural Catchment in Northern Thailand: With Focus on Atrazine and Metabolites

Lee,

Ziegler,

et al. 2024

ACS EST Water

View full text Add to dashboard Cite

This study investigates the longitudinal and temporal trends of atrazine, a persistent herbicide, in the Mae Sa catchment in northern Thailand. Concentrations of atrazine determined from targeted analysis were elevated during the wet season, and great variability was observed in relation to individual storm runoff hydrographs. When compared to regulatory limits, the observed atrazine concentrations in Mae Sa were generally below environmental thresholds of concern. However, greater risk may occur in other tributary systems feeding the Ping River, where some concentrations exceeding 2000 ng/L were observed, although they were not sustained for extended periods of time. Additionally, nontargeted screening identified 16 other agrochemicals with known potential environmental risks or associated toxicity. Despite the minor risk posed by atrazine alone, the research highlights the intricate interplay of agricultural practices, diverse pesticide application, and hydroclimatic factors in influencing pesticide dynamics. In the broader context, this study underscores the challenge of estimating risks arising from pesticide mixtures while using a combination of targeted analysis, nontargeted screening, in silico prediction models, and in vitro bioassays. Collectively, we find evidence of the presence of more than 100 pesticides in the catchment since dedicated work began there more than a decade ago.

show abstract

Bifenthrin’s Environmental Fate: An Insight Into Its Soil Sorption and Degradation Studies

Al-Hawadi,

Majid,

Ahmad

et al. 2024

Journal of Analytical Methods in Chemistry

View full text Add to dashboard Cite

To fully comprehend each pesticide’s behavior and interactions with soil and the environment, a thorough and nuanced analysis of each one is thought necessary. In this study, 10 randomly selected heterogeneous soil samples, each with distinct characteristics, were subjected to sorption trials as well as disintegration tests using biodegradation, hydrolysis, and photolysis. For sorption tests, the batch equilibrium approach was used, which revealed a dependence on the soils’ physicochemical characteristics. Bifenthrin’s distribution coefficient (Kd) varied from 7.27 to 25.89 μg·ml−1, with R2 values varying from 0.92 to 0.99. Each soil physicochemical characteristic was associated with the various sorptive outcomes, which suggested an exothermic adsorptive reaction based on the negative thermodynamic values. The hydrolysis, soil‐induced biodegradation, and photolysis processes had the shortest half‐lives of bifenthrin, measuring 13.5 days, 12 days, and 121.5 days, respectively. According to these findings, bifenthrin has a moderate amount of binding and stability in soil, which makes partial decomposition of parent and daughter molecules challenging. This research advances our knowledge of bifenthrin’s deteriorating processes and aids in the creation of cutting‐edge strategies for ecological restoration using natural processes.

show abstract

Pesticide Dissipation and Fate in Agricultural Settings

Cited by 3 publications

References 258 publications

Contact exposure of honey bees and social stingless bees to fungicide sprayed on cotton and soybean in a controlled field simulation system

Contact exposure of honey bees and social stingless bees to fungicide sprayed on cotton and soybean in a controlled field simulation system

Riverine Pesticides in an Agricultural Catchment in Northern Thailand: With Focus on Atrazine and Metabolites

Bifenthrin’s Environmental Fate: An Insight Into Its Soil Sorption and Degradation Studies

Contact Info

Product

Resources

About