N-(2-nitrophenyl)phosphoric triamide

Field studies

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

Test material information

Constituent 1

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.