Registration Dossier

Diss Factsheets

Administrative data

Endpoint:
toxicity to terrestrial plants: short-term
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2005-09-01 - 2006-08-24
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
comparable to guideline study with acceptable restrictions

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2006
Report date:
2006

Materials and methods

Test guideline
Qualifier:
according to guideline
Guideline:
other: AA-FA-109
Deviations:
no
GLP compliance:
no

Test material

Constituent 1
Chemical structure
Reference substance name:
-
EC Number:
477-690-9
EC Name:
-
Cas Number:
874819-71-3
Molecular formula:
Hill formula: C6H9N4O3P CAS formula: C6H9N4O3P
IUPAC Name:
N-(diaminophosphoryl)-2-nitroaniline
Test material form:
solid: bulk

Sampling and analysis

Analytical monitoring:
no

Test substrate

Vehicle:
yes

Test organisms

Species:
Triticum aestivum
Plant group:
Monocotyledonae (monocots)
Details on test organisms:
summer wheat, summer barley, summer rape and sugar beet

Study design

Test type:
seedling emergence and seedling growth test
Study type:
laboratory study
Substrate type:
natural soil
Limit test:
no
Total exposure duration:
23 d

Test conditions

Moisture:
WK60 = 14, 4 g/ 100 g TS
Reference substance (positive control):
no

Results and discussion

Effect concentrations
Key result
Species:
Triticum aestivum
Duration:
23 d
Dose descriptor:
NOEC
Effect conc.:
> 0.44 mg/kg soil ww
Nominal / measured:
nominal
Conc. based on:
test mat.
Basis for effect:
phytotoxicity

Applicant's summary and conclusion

Validity criteria fulfilled:
yes
Conclusions:
A growth-inhibiting or phytotoxic effect caused by the urease hibitor P 101/04 can be excluded.
Executive summary:

The plant toxicity of 2-NPT in mixtures with urea was tested on spring wheat, spring barley, spring rape and sugar beet.

The concentration of the inhibitor active substance in urea was 0.03; 0.06; 0.09; 0.12; 0.15 and 0.18 %. No phytotoxic effects of the urease inhibitor 2-NPT were observed.

In tests on the influence of 2-NPT on plant yields, no growth-inhibiting effect of 2-NPT was observed.