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Environmental fate & pathways

Field studies

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Administrative data

Endpoint:
field studies
Type of information:
experimental study
Adequacy of study:
supporting study
Study period:
2005-03-21 - 2006-06-07
Reliability:
2 (reliable with 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: European Community Guideline 7029/VI/95 - rev.5, 22/07/97
Deviations:
no
GLP compliance:
yes (incl. QA statement)
Type of measurement:
Residues of P101/04

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: crystalline

Results and discussion

Any other information on results incl. tables

No residues of P101/04 above the limit of quantitation were found in any of the untreated specimens.

Residue Concentrations:

A summary of the residues of P101/04 is given in the following table:


Crop

Specimen

Number of

Growth

Sampling timing

P101/04

 

 

specimens

stage

DALA

mg/kg

 

 

 

BBCH

 

 

winter wheat

whole plant without roots

8

32

0

<0.01

 

whole plant without roots

8

57-59

33 - 59

<0.01

 

whole plant without roots

8

72-73

48-75

<0.01

 

grain

8

89-91

107 - 124

< 0.01

 

straw

8

89-91

107 - 124

< 0.05

winter rape

whole plant without roots

8

51 -62

0

0.010-0.020

 

whole plant without roots

8

53-63

6 - 12

0.014-0.058

 

whole plant without roots

8

69

34-41

<0.01

 

seed

8

89-91

95 - 104

< 0.01

The residues of P101/04 in all of the analysed specimens in winter wheat were below the limit of quantitation.

The residues of P101/04 in winter rape at BBCH 51 - 62 (0 DALA) were 0.010 - 0.020 mg/kg. They increased to 0.014 - 0.058 mg/kg at BBCH 53 - 63 (6 - 12 DALA) and decreased at the subsequent two samplings to residues below the limit of quantitation.

Applicant's summary and conclusion

Conclusions:
The residues of P101/04 in all of the analysed specimens in winter wheat were below the limit of quantitation.

The residues of P101/04 in winter rape at BBCH 51 - 62 (0 DALA) were 0.010 - 0.020 mg/kg. They increased to 0.014 - 0.058 mg/kg at BBCH 53 - 63 (6 - 12 DALA) and decreased at the subsequent two samplings to residues below the limit of quantitation.
Executive summary:

During the growing season of 2005, four field trials each of winter wheat and winter rape were treated with the urease inhibitor P101/04 in Germany. Two plots were chosen at each location: Winter wheat: Plot U (control): treated twice, each time with 239 kg/ha of PI AG RAN 46 (110 kg N/ha) Plot T (treated): treated twice, each time with 239 kg/ha of P 8/05/F-2 (110 kg N/ha and 0.124 kg P101/04/ha) The first application took place at the beginning of vegetation and the second at BBCH 32. Winter rape: Plot U (control): treated twice, 1st treatment with 304 kg/ha of PIAGRAN 46 (140 kg N/ha) and 2nd treatment with 217 kg/ha of PIAGRAN 46 (100 kg N/ha) Plot T (treated): treated twice, 1st treatment with 304 kg/ha of P 8/05/F-2 (140 kg N/ha and 0.158 kg P101/04/ha) and 2nd treatment with 217 kg/ha of P 8/05/F-2 (100 kg N/ha and 0.113 kg P101/04/ha) The first application took place at the end of March and the second one 3 - 4 weeks after the 1st application.

No residues of P101/04 above the limit of quantitation were found in any of the ntreated specimens.

The residues of P101/04 in all of the analysed specimens in winter wheat were below the limit of quantitation.

The residues of P101/04 in winter rape at BBCH 51 - 62 (0 DALA) were 0.010 - 0.020 mg/kg. They increased to 0.014 - 0.058 mg/kg at BBCH 53 - 63 (6 - 12 DALA) and decreased at the subsequent two samplings to residues below the limit of quantitation.