Registration Dossier

Ecotoxicological information

Toxicity to soil macroorganisms except arthropods

Currently viewing:

Administrative data

Endpoint:
toxicity to soil macroorganisms except arthropods: long-term
Type of information:
experimental study
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Already evaluated by the Competent Authorities for Biocides and Existing Substance Regulations.

Data source

Reference
Reference Type:
publication
Title:
Toxicity of pesticides to Allolobophora caliginosa (Oligochaeta: Lumbricidae)
Author:
Martin, N.A.
Year:
1986
Bibliographic source:
New Zealand Journal of Agricultural Research 29, 699-706

Materials and methods

Principles of method if other than guideline:
The effects of various pesticides on survival and cocoon production of earthworms were assesed. Juvenile (4-week-old) earthworms reared in a laboratory were kept individually for 7 days in soil treated with several concentrations of pesticides. Mortality and weight change were recorded.

Test material

Reference
Name:
Unnamed
Type:
Constituent

Test organisms

Test organisms (species):
other: Allolobophora caliginosa

Study design

Study type:
laboratory study

Results and discussion

Effect concentrationsopen allclose all
Duration:
14 d
Dose descriptor:
NOEC
Effect conc.:
50 mg/kg soil dw
Nominal / measured:
meas. (initial)
Conc. based on:
element
Basis for effect:
other: cocoon production (No bioavailability correction possible as CEC is not given or can not be derived.)
Remarks on result:
other: No bioavailability correction possible as CEC is not given or can not be derived.
Duration:
14 d
Dose descriptor:
NOEC
Effect conc.:
500 mg/kg soil dw
Nominal / measured:
meas. (initial)
Conc. based on:
element
Basis for effect:
mortality
Remarks:
(No bioavailability correction possible as CEC is not given or can not be derived.)
Remarks on result:
other: No bioavailability correction possible as CEC is not given or can not be derived.

Applicant's summary and conclusion

Conclusions:
Reliability: NOEC values reported were 50 and 500 mg/kg.
No bioavailability correction possible as CEC is not given or can not be derived.

Executive summary:

Juvenile (4-week-old) earthworms reared in a laboratory were kept individually for 7 days in soil treated with several concentrations of various pesticides. Mortality and weight change were recorded. The relative toxicity of each pesticides – i.e., the concentration (mg/kg of dry soil) of pesticide causing zero growth- compared with the standard, carbofuran (0.10), was aldicarb (0.09), phorate (0.30), aldoxycarb (0.40), methomyl (0.54), oxamyl (0.59), isazophos (0.93), fenamifos (5.72), fensulfothion (7.35), diazion (12.4), copper (106), and citowett (525). Field trial data from 33 published reports show similar relative toxicity results. The toxicity of carbofuran to Lumbricus rubellus and Allolobophora caliginosa was similar. Decreasing concentrations of carbofuran caused mortality, suppression of growth, and suppression of egg capsule production in mature (clitellate) A. caliginosa collected from the field. The concentrations of carbofuran safe to juvenile and clitellate A caliginosa were similar. Use of a single batch of natural soil, an artificial soil, or the silica powder and glass bead media used in one of the proposed EEC test could reduce variation between tests. The letter media would provide the most standardised conditions for a toxicity test. Juvenile A caliginosa which are easily reared would be a more appropriate species for the EEC test than Eisenia fetida.