Boric acid as reference substance for ecotoxicity tests in tropical artificial soil

Niemeyer, Júlia Carina; Carniel, Letícia Scopel Camargo; Santo, Fernanda Benedet de; Silva, Mayrine; Filho, Osmar Klauberg

doi:10.1007/s10646-018-1915-7

Cited by 18 publications

(8 citation statements)

References 15 publications

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“…All ecotoxicological assays met the validity criteria (ISO, 2014; Supplemental Table S2), and the collembolans F. candida had a good reproductive performance in the Entisol (247 ± 41) and the Oxisol (165 ± 15). The species was also considered sensitive to boric acid because the EC 50 found was 175 mg kg −1 (ISO, 2014; Niemeyer et al., 2018).…”

Section: Resultsmentioning

confidence: 99%

“…Collembolans F. candida (Collembola: Isotomidae) were used in the ecotoxicological assays. The organism's sensitivity was checked (effective concentration causing reductions in species reproduction of 50% [EC 50 ] = 175.51 mg kg −1 ) according to Niemeyer, Carniel, de Santo, Silva, and Klauberg-Filho (2018). Collembolans were bred in plastic containers with a mixture of plaster of Paris, water, and activated charcoal (10:7:1).…”

Section: Test Organismsmentioning

confidence: 99%

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Toxicity of imidacloprid to collembolans in two tropical soils under different soil moisture

et al. 2020

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Shifts in precipitation regimes due to the predicted climate changes can alter the water content in tropical soils and, consequently, may influence the toxicity of pesticides to soil fauna. This study assessed the influence of soil moisture content on the toxicity of the insecticide imidacloprid to the collembolans Folsomia candida in two tropical soils and evaluated the risk of this active ingredient for this species in the soils tested through the toxicity exposure ratio approach. Acute and chronic toxicity tests with F. candida were performed using an Entisol and an Oxisol. The soils were spiked with increasing imidacloprid concentrations while simulating normal water availability (60% of the water holding capacity [WHC]) and water restriction (30 or 45% WHC) for the tests. In the Oxisol, the reduction of soil moisture content significantly increased the toxic effects of imidacloprid on F. candida's survival (LC 50 at 45% WHC = 23.8 vs. LC 50 at 60% WHC >64 mg kg −1) and reproduction (effective concentration causing reductions in species reproduction of 50% [EC 50 ] at 45% WHC = 0.32 vs. EC 50 at 60% WHC = 2.83 mg kg −1), but in the Entisol no clear influence of the soil moisture on the toxicity of imidacloprid for collembolans was found. A significant risk for F. candida was observed in the Oxisol only when in water restriction, whereas in the Entisol it occurred regardless of soil moisture, suggesting that the imidacloprid hazard and risk for F. candida may be increased if soil moisture decreases due to climate changes, depending on the soil type.

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Section: Resultsmentioning

confidence: 99%

Section: Test Organismsmentioning

confidence: 99%

Toxicity of imidacloprid to collembolans in two tropical soils under different soil moisture

et al. 2020

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“…One additional issue has already (partly) been clarified: for the reference substance boric acid (nowadays used in almost all invertebrate tests recommended by the International Standardization Organization (ISO), but less by the Organization for Economic Co-operation and Development (OECD)) the respective range of test results gained under tropical and temperate conditions seems to be comparable, but this needs confirmation for other chemicals. It also has to be assured that the OM content is similar when comparing temperate and tropical results of testing reference substances (Niemeyer et al, 2018a).…”

Section: Toxicity Test Methodsmentioning

confidence: 99%

Environmental risk assessment of pesticides in tropical terrestrial ecosystems: Test procedures, current status and future perspectives

Daam

Chelinho

Niemeyer

et al. 2019

Ecotoxicology and Environmental Safety

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“…Rectangular plastic containers, each 26.2 cm long, 17.7 cm wide, and 8.5 cm high, were employed for the tests. These containers were lled to a depth of 4-5 cm with Oxisol, approximately 300 g of dry soil per container (Niemeyer et al 2018). Each container was divided into halves; one half was lled with control soil and the other with soil treated with the herbicide, separated by a cardboard divider to avoid mixing before the earthworms were introduced.…”

Section: Avoidance Testmentioning

confidence: 99%

Ecotoxicological assessment of ammonium glufosinate (Finale®) on Eisenia andrei (Bouché 1972)

Silva,

Schedenffeldt,

Dias

et al. 2024

Preprint

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Amid rising pesticide use, particularly ammonium glufosinate, and the emergence of herbicide-resistant weeds and glufosinate-tolerant transgenic crops, it is vital to understand the effects of herbicides on terrestrial ecosystems. This study aimed to evaluate the ecotoxicological effects of a commercial formulation of ammonium glufosinate (Finale®) on earthworms (Eisenia andrei), focusing on acute, avoidance, and chronic toxicity. The tests were conducted according to ISO standards (11268-1:1993; 11268-2:1998; 17512-1:2008). All trials adopted a completely randomized design (CRD), with six concentrations of the herbicide Finale® (acute: 0, 175, 340, 505, 670, and 835 mg ai kg− 1; chronic and avoidance: 0.0, 3.3, 5.0, 6.7, 8.3, and 10.0 mg ai kg− 1) and four replicates for acute and chronic tests, plus five replicates for the avoidance test. Results indicated significant impacts on the survival, biomass, reproduction, and avoidance behaviors of earthworms at certain concentrations. The LC50-14d was established at 611.68 mg ai kg− 1, indicating moderate toxicity of the herbicide. The EC50 for reproduction effects at 56 days and for inducing escape within 48 hours were determined to be 4.49 mg ai kg− 1 and 3.30 mg ai kg− 1, respectively. Concentrations of 8.3 and 10 mg ai kg− 1 induced the highest escape responses.

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Boric acid as reference substance for ecotoxicity tests in tropical artificial soil

Cited by 18 publications

References 15 publications

Toxicity of imidacloprid to collembolans in two tropical soils under different soil moisture

Toxicity of imidacloprid to collembolans in two tropical soils under different soil moisture

Environmental risk assessment of pesticides in tropical terrestrial ecosystems: Test procedures, current status and future perspectives

Ecotoxicological assessment of ammonium glufosinate (Finale®) on Eisenia andrei (Bouché 1972)

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