Copper

Toxicity to terrestrial plants

Administrative data

Endpoint:

toxicity to terrestrial plants: 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:

Upper critical-level of copper in wheat (Triticum aestivum) raised on typic ustipsamment soil

Author:

Chhibba, I.M. et al.

Year:

1994

Bibliographic source:

Indian Journal of Agricultural Sciences 64, 285-289

Materials and methods

Principles of method if other than guideline:

Effect of different levels of copper (0, 5, 10, 20, 40, 80, 160, 320 and 640 mg/kg soil) was studied on `WL 1562` wheat (Triticum aestivumL. emend. Fiori & Paol.) grown on a Fatehpur loamy sand soil under greenhouse conditions.

Test material

Test material information

Constituent 1

Reference substance name:

copper compound not reported

IUPAC Name:

copper compound not reported

Test organisms

Species:

Triticum aestivum

Results and discussion

Effect concentrations

Species:

Triticum aestivum

Dose descriptor:

NOEC

Effect conc.:

40 mg/kg soil dw

Nominal / measured:

meas. (initial)

Conc. based on:

element

Basis for effect:

other: yield (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.

Any other information on results incl. tables

see Executive summary

Applicant's summary and conclusion

Conclusions:

Reliability: high quality NOEC values is 40 mg/kg (yield)
No bioavailability correction possible as CEC is not given or can not be derived.

Executive summary:

Effect of different levels of copper (0, 5, 10, 20, 40, 80, 160, 320 and 640 mg/kg soil) was studied on `WL 1562` wheat (Triticum aestivumL. emend. Fiori & Paol.) grown on a Fatehpur loamy sand soil under greenhouse conditions. Mean dry-matter yield of wheat decreased significantly with the application of Cu @ > 20mg/kg soil. Copper- toxicity symptoms in plants were observed with 40 mg Cu/kg soil treatment, and they became severe at its higher levels. Copper content > 15.5µg/g in flage-leaf of wheat and 8 mg/kg in soils indicated the threshold values above which plants would suffer from its toxicity. A significant decline was observed in iron boron content of flag leaf with increase in Cu rate.