Ecological risk assessment of pesticide residues in soils from vegetable production areas: A case study in S-Nepal

Bhandari, Govinda; Atreya, Kishor; Vašíčková, Jana; Yang, Xiaomei; Geissen, Violette

doi:10.1016/j.scitotenv.2021.147921

Cited by 52 publications

(30 citation statements)

References 70 publications

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“…Many studies report that only a few farmers read the labels and most follow instructions provided by agrovets (Giri et al, 2006;Pudasaini et al, 2016;Lamichhane et al, 2018;. However, agrovets often cannot provide farmers with adequate guidance concerning pesticide selection and use (Giri et al, 2006;Pudasaini et al, 2016;Adhikari et al, 2019;Sapkota et al, 2020;Bhandari et al, 2021). Farmers are sometimes misguided by agrovets based on their limited technical knowledge (Rijal et al, 2018).…”

Section: Knowledge Synthesis and Discussionmentioning

confidence: 99%

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Understanding farmers’ knowledge, attitudes and practices of pesticide use in Nepal: synthesis of a systematic literature review

Atreya

Kattel

Pandit

et al. 2022

Arch. Agric. Environ. Sci.

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Literature suggests a deeper understanding of farmers’ knowledge, attitude and practice (KAP) of pesticide use in agriculture, especially in developing countries, to identify interventions to reduce pesticide use in agriculture. In this paper, we thus performed a systematic review of literature on KAP of farmers on chemical pesticide use in Nepal through a systematic literature search on Scopus web repository published between 2000 and 2021. We got 114 publications initially, and with a well-defined inclusion and exclusion criteria, we finally reviewed 29 articles for data extraction. The results indicate (i) an inadequate KAP of farmers on pesticide use. For example, three in four farmers were found to wash their clothes after pesticide spray. One in four farmers wore boots and only one in ten farmers wore glasses during pesticide spray. Approximately 54% of farmers take a shower after pesticide spray and just one in four farmers bury empty pesticide containers in the soil. Prior studies identified that the lack of awareness and training on the handling practices is the major cause of pesticide misuse; and through formal education and introducing integrated pest management strategies for controlling pests could reduce pesticide misuse. Another notable finding is the lack of KAP theoretical understanding in the prior publications. Many studies in Nepal studied much less on ‘attitude” but much higher on “practice” of pesticide usage. We thus propose a new KAP study framework for future research to understand ground-level behavioral change and improve the effectiveness of the KAP-related programs and interventions.

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Section: Knowledge Synthesis and Discussionmentioning

confidence: 99%

“…Farmers lack knowledge of proper disposal of pesticide containers/packets/sachets/bottles. Studies show the used bottles, packets and sachets of pesticides thrown haphazardly into the environment (Koirala et al, 2013;Lamichhane et al, 2018;Sapkota et al, 2020;Bhandari et al, 2021;Sharma et al, 2021).…”

Section: Knowledge Synthesis and Discussionmentioning

confidence: 99%

Understanding farmers’ knowledge, attitudes and practices of pesticide use in Nepal: synthesis of a systematic literature review

Atreya

Kattel

Pandit

et al. 2022

Arch. Agric. Environ. Sci.

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“…First, the overuse of organic fertilizers and agrochemicals such as pesticides and antibiotics is very common in soils under greenhouse vegetable production (Wang et al, 2006;Bhandari et al, 2021). Organic fertilizer has been found to favor the growth of fungi or nonbacterial microorganisms (Wen et al, 2020;Sabir et al, 2021), implying that the microbial biomass and urease activity in greenhouse soil largely originate from these nonbacterial microorganisms; however, in the present study, only bacterial 16S and ureC genes were quantified, so it would have been interesting to investigate the total genes in the greenhouse soil to reveal ureolytic microbial abundance.…”

Section: Factors That Affect Urease Activity and Uhr In Biochar-amend...mentioning

confidence: 99%

Urea hydrolysis in different farmland soils as affected by long-term biochar application

Zhao

Ju-ying

et al. 2022

Front. Environ. Sci.

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Urea is a commonly used nitrogen (N) fertilizer that contributes to world food production, and there have been increasing concerns about relatively low urea-N use efficiency. Biochar has shown the potential to mitigate N loss, but how biochar influences urea hydrolysis and the underlying mechanisms are still unclear. In this study, long-term biochar-amended upland, paddy and greenhouse soils were sampled at depths of 0–20 and 20–40 cm in Haicheng City, Northeast China. Soil N contents, urea hydrolysis rates (UHRs), and total, intracellular and extracellular urease activities were determined, as well as the total bacterial and ureolytic microbial gene abundance were quantified. The results showed that biochar increased total urease activity by 32.64–66.39% in upland soil and by 2.90–2.13-fold in paddy soil. Both intracellular and extracellular ureases contributed to the increase in total urease activity. However, in greenhouse soil, extracellular (+35.07–74.22%) and intracellular (−40.14–77.68%) urease activities responded inconsistently to biochar incorporation. Increases in ureC gene copy numbers (2.15- to 4.47-fold) in upland and greenhouse (20.93%) soil implied that biochar stimulated microorganisms capable of producing urease, and the biochar liming effect increased the soil pH (0.11–0.60 units), which optimized the ureolytic reaction, together explained the increases in urease activity. We found that the decreased soil N content was accompanied by a higher UHR in upland and greenhouse soils, suggesting that the accelerated UHR exerted a negative effect on the soil N content, possibly caused by excessive NH3 volatilization. In paddy soil, where the UHR was not increased, biochar was an effective amendment for simultaneously improving soil urease activity and N content.

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“…[1] However, several studies have shown that the use of neonicotinoid insecticides, such as imidacloprid, is a key factor for declining biodiversity of nontarget terrestrial insects. [2][3][4][5] In addition, imidacloprid residues affect soil properties, [6] soil organisms, [7][8][9] and take a threat to human health. [10] Imidacloprid is highly soluble in water, and there is a high possibility of it to enter into aquatic ecosystems through runoff, and thus potentially may pose risks to aquatic organisms, [11][12] such as dropping the survival of invertebrates, [13] inducing cyanobacteria blooms [14] and so on.…”

Section: Introductionmentioning

confidence: 99%

Preparation of BiVO₄/RGO‐TNT Nanomaterials for Efficient and Recyclable Photocatalysis of Imidacloprid Insecticide

et al. 2022

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The photocatalytic composites based on BiVO4, TiO2 nanotubes (TNT) and reduced graphene oxide (RGO) were synthesized by a one‐step hydrothermal synthesis method. The properties and structures of the samples were characterized by SEM, XRD, UV‐Vis DRS, Raman spectroscopy, photoluminescence spectroscopy and XPS. The effects of RGO‐TNT loading, pH, and dosage of catalysts on degradation efficiency were tested. The best removal results were occured on the condition that loading amount of RGO‐TNT was 10 %, solution pH 10, and catalyst dosage was 1.4 g L−1. The obtained ternary composite with 10 wt% RGO‐TNT exhibited a significant enhancement in photocatalytic efficiency due to the lower band gap with enhanced light absorption and a suppression in the recombination rates of the photogenerated charge carriers, and about 73 % of imidacloprid was degraded within 30 min under UV irradiation. Furthermore, BiVO4/RGO‐TNT‐10 can be reused for 6 times without obvious catalysis loss. Trapping experiments showed that hydroxyl radicals were the main active species in the imidacloprid photocatalytic degradation, and a possible photocatalytic mechanism was proposed based on the results of trapping experiments.

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Ecological risk assessment of pesticide residues in soils from vegetable production areas: A case study in S-Nepal

Cited by 52 publications

References 70 publications

Understanding farmers’ knowledge, attitudes and practices of pesticide use in Nepal: synthesis of a systematic literature review

Understanding farmers’ knowledge, attitudes and practices of pesticide use in Nepal: synthesis of a systematic literature review

Urea hydrolysis in different farmland soils as affected by long-term biochar application

Preparation of BiVO₄/RGO‐TNT Nanomaterials for Efficient and Recyclable Photocatalysis of Imidacloprid Insecticide

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Ecological risk assessment of pesticide residues in soils from vegetable production areas: A case study in S-Nepal

Cited by 52 publications

References 70 publications

Understanding farmers’ knowledge, attitudes and practices of pesticide use in Nepal: synthesis of a systematic literature review

Understanding farmers’ knowledge, attitudes and practices of pesticide use in Nepal: synthesis of a systematic literature review

Urea hydrolysis in different farmland soils as affected by long-term biochar application

Preparation of BiVO4/RGO‐TNT Nanomaterials for Efficient and Recyclable Photocatalysis of Imidacloprid Insecticide

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Product

Resources

About

Preparation of BiVO₄/RGO‐TNT Nanomaterials for Efficient and Recyclable Photocatalysis of Imidacloprid Insecticide