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Ecotoxicological information

Toxicity to soil microorganisms

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Link to relevant study record(s)

Description of key information

Ben-Yephet, 1981, was conducted on Microsclerotia of Verticillium dahliae Kled. Microsclerotia were exposed to the test substance via leachates and fumigations from the surrounding treated soil. Microsclerotia was also exposed without soil. Ben-Yephet, 1981, reported 97% lethality without soil at 470µg/ml^-1 and a similar effect at 12.5µg/g^-1 in soil. 
Wilhelm, 1966, is included as a source of secondary information only. No information on the methodology or conditions employed. The result given is that the test substance produces no effects on the microsclerotia of Verticillium at 100 gallons per acre, but that this same does is lethal to conidia.

Key value for chemical safety assessment

Long-term EC10 or NOEC for soil microorganisms:
0.006 µg/kg soil dw

Additional information

A weight of evidence approach was taken for this endpoint. Ben-Yephet et al, 1981, was awarded the reliability score of 2 was the study was well documented and peer-reviewed. No guideline was followed and a novel methodology was used therefore reducing the reliability to 2 due to lack of comparability. Wilhelm, 1966, was awarded a reliability score of 4 as an insufficient level of detail was reported to allow for assessment of the reliability from this secondary source.

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