Persistence of myclobutanil and its impact on soil microbial biomass C and dehydrogenase enzyme activity in tea orchard soils

Zhang, Dongdong; Wu, Yanan; Zhang, Xiaolin; Zhu, Yanhui

doi:10.18393/ejss.286539

Cited by 5 publications

(6 citation statements)

References 31 publications

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“…Sampling was carried out after 1, 3, 5, and 10 days of incubation. This study found a decrease in the soil's microbial biomass with the increasing of the concentration of myclobutanil and the incubation time [34].…”

Section: Myclobutanilmentioning

confidence: 49%

“…Myclobutanil was applied to tea orchard soil at doses of 0.1, 1, and 10 mg/kg of soil and incubated for 10 days [34]. Sampling was carried out after 1, 3, 5, and 10 days of incubation.…”

Section: Myclobutanilmentioning

confidence: 99%

“…Application of the myclobutanil in a dose of 0.1 mg/kg of soil produced an increase in DHA activity, the highest activity being found in day 10. Application of the myclobutanil in doses of 1 and 10 mg/kg of soil produced a decrease in DHA activity for the first five days, and the DHA activity tended to recover at day 10 [34]. In another study, the myclobutanil was applied at a dose of 2 mg/kg of sandy loam tea orchard soil unamended and amended with fertilizers and the soil samples were incubated under environmental conditions for 12 months [57].…”

Section: Myclobutanilmentioning

confidence: 99%

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Effects of Triazole Fungicides on Soil Microbiota and on the Activities of Enzymes Found in Soil: A Review

et al. 2021

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Triazole fungicides can manifest toxicity to a wide range of non-target organisms. Within this study we present a systematic review of the effects produced on the soil microbiota and activity of soil enzymes by the following triazole fungicides: cyproconazole, difenoconazole, epoxiconazole, flutriafol, hexaconazole, metconazole, myclobutanil, paclobutrazole, propiconazole, tebuconazole, tetraconazole, triadimenol, triadimefon, and triticonazole. Known effects of the triazole fungicides on the soil activity are dose dependent. High doses of triazole fungicides strongly affects the structure of the microbial communities in soil and usually decrease the soil microbial population and the activities of enzymes found in soil.

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Section: Myclobutanilmentioning

confidence: 49%

“…Myclobutanil was applied to tea orchard soil at doses of 0.1, 1, and 10 mg/kg of soil and incubated for 10 days [34]. Sampling was carried out after 1, 3, 5, and 10 days of incubation.…”

Section: Myclobutanilmentioning

confidence: 99%

Section: Myclobutanilmentioning

confidence: 99%

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Effects of Triazole Fungicides on Soil Microbiota and on the Activities of Enzymes Found in Soil: A Review

et al. 2021

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“…Several published papers showed that difenoconazole applied in various concentrations produced a decrease in the DHA, PhA, and UA [ 49 , 50 ]. Myclobutanil [ 62 , 63 ], paclobutrazol [ 64 ], and triadimefon [ 61 ] applications also produced decreases in the DHA. The propioconazole application conducted caused a decrease in the PhA and UA [ 65 ].…”

Section: Resultsmentioning

confidence: 99%

Assessment of the Effects of Triticonazole on Soil and Human Health

et al. 2022

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Triticonazole is a fungicide used to control diseases in numerous plants. The commercial product is a racemate containing (R)- and (S)-triticonazole and its residues have been found in vegetables, fruits, and drinking water. This study considered the effects of triticonazole on soil microorganisms and enzymes and human health by taking into account the enantiomeric structure when applicable. An experimental method was applied for assessing the effects of triticonazole on soil microorganisms and enzymes, and the effects of the stereoisomers on soil enzymes and human health were assessed using a computational approach. There were decreases in dehydrogenase and phosphatase activities and an increase in urease activity when barley and wheat seeds treated with various doses of triticonazole were sown in chernozem soil. At least 21 days were necessary for the enzymes to recover the activities. This was consistent with the diminution of the total number of soil microorganisms in the 14 days after sowing. Both stereoisomers were able to bind to human plasma proteins and were potentially inhibitors of human cytochromes, revealing cardiotoxicity and low endocrine disruption potential. As distinct effects, (R)-TTZ caused skin sensitization, carcinogenicity, and respiratory toxicity. There were no significant differences in the interaction energies of the stereoisomers and soil enzymes, but (S)-TTZ exposed higher interaction energies with plasma proteins and human cytochromes.

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“…To the best of our knowledge, there are only several studies published in the literature on the effects of myclobutanil on soil enzyme activity. A small dose of myclobutanil applied to tea orchard soil produced an increase in DA, but higher doses led to decreased DA [33]. When using sandy tea garden soil, DA was slightly inhibited in the presence of myclobutanil during the first 30 days, but this effect disappeared over time [34].…”

Section: Introductionmentioning

confidence: 95%

The Effects of the Fungicide Myclobutanil on Soil Enzyme Activity

Roman,

Matica,

Ciorsac

et al. 2023

Agriculture

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(1) Background: The use of pesticides, although needed to protect crops and increase production, represents an environmental and human health issue. Therefore, measures must be taken in order to develop a better understanding of the risks involved in the overuse of these compounds. Myclobutanil is a chiral triazole fungicide widely used for the protection of crops against fungal diseases. Published data have shown that, although effective in preventing fungal infections, high doses of myclobutanil can affect the soil environment. The aim of this study was to evaluate the effect of different doses of myclobutanil on soil enzyme activity, as well as the possible specificity of the interactions of the two stereoisomers of myclobutanil with these enzymes. (2) Methods: A combination of experimental and computational approaches was considered. An experimental method was applied in order to assess the effect of different doses of myclobutanil on the activity of dehydrogenase, phosphatase, catalase, urease and protease. The computational approach was based on the molecular docking of the two enantiomers of myclobutanil with the above-mentioned enzymes to assess the possible enantioselectivity of the interactions. (3) Results: High doses of myclobutanil significantly affected the enzymatic activity of dehydrogenase and led to a slight increase in the activity of catalase. Molecular docking data showed that both enantiomers of myclobutanil were able to bind to the active sites of dehydrogenase, phsosphatase and protease, with higher interacting energies observed for (S)-myclobutanil, the enantiomer known to be less active against target organisms but have a higher toxicity against non-target organisms. (4) Conclusions: The results of our study confirm the need to implement better management practices regarding the use of myclobutanil (and of pesticides in general) by using the enantiomer that is most effective on target organisms and less toxic to non-target organisms.

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Persistence of myclobutanil and its impact on soil microbial biomass C and dehydrogenase enzyme activity in tea orchard soils

Cited by 5 publications

References 31 publications

Effects of Triazole Fungicides on Soil Microbiota and on the Activities of Enzymes Found in Soil: A Review

Effects of Triazole Fungicides on Soil Microbiota and on the Activities of Enzymes Found in Soil: A Review

Assessment of the Effects of Triticonazole on Soil and Human Health

The Effects of the Fungicide Myclobutanil on Soil Enzyme Activity

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