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Incident Report

Subform I: General Information

1. Report Type.

New incident report

Incident Report Number: 2013-2458

2. Registrant Information.

Registrant Reference Number: DTF_04232013-3

Registrant Name (Full Legal Name no abbreviations): Industry Task Force II on 2,4-D Research Data

Address: 8325 Old Deer Trail

City: Raleigh

Prov / State: NC

Country: USA

Postal Code: 27615

3. Select the appropriate subform(s) for the incident.

Scientific Study

4. Date registrant was first informed of the incident.

5. Location of incident.

6. Date incident was first observed.

Product Description

7. a) Provide the active ingredient and, if available, the registration number and product name (include all tank mixes). If the product is not registered provide a submission number.

PMRA Registration No.       PMRA Submission No.       EPA Registration No. Unknown

Product Name: 2,4-Dichlorophenol

• Active Ingredient(s)
  • 2,4-D (PRESENT AS ACID)

7. b) Type of formulation.

Application Information

8. Product was applied?

Unknown

9. Application Rate.

10. Site pesticide was applied to (select all that apply).

11. Provide any additional information regarding application (how it was applied, amount applied, the size of the area treated etc).

To be determined by Registrant

12. In your opinion, was the product used according to the label instructions?

Unknown

Subform VII: Scientific Study

1. Study Reference

Title Toxicity of 2,4-Dichlorophenol to the Aquatic Plant Myriophyllum Aquaticum in a Static Growth Inhibition Test with a Prior Rooting Phase

Date 13-JAN-12

2. a) Is an extension needed to translate the document?

No

3. Type of incident identified in the study

Presence of a component or derivitive

4. Describe the incident identified in the study (e.g. study demonstrates an increased risk to non-Hodgkin's Lymphoma after exposure to pesticide X)

The influence of 2,4-Dichlorophenol on the growth of the dicotyl freshwater plant Myriophyllum aquaticum was assessed in a static dose-response test. For the parameter shoot length the 10-day ErC50 was calculated to be 30.5 mg test item/L (equivalent to the geometric mean measured concentration of 23.0 mg test item/L) and the 10-day EyC50 to be 26.0 mg test item/L (equivalent to the geometric mean measured concentration of 19.0 mg test item/L). For fresh weight the 10-day ErC50 was calculated to be 25.8 mg test item/L (equivalent to the geometric mean measured concentration of 18.4 mg test item/L) and the 10-day EyC50 to be 19.6 mg test item/L (equivalent to the geometric mean measured concentration of 12.4 mg test item/L). The lowest 10-day NOEC for yield and growth rate was based on biomass (fresh weight) measurements and was determined to be 5.01 mg test item/L (equivalent to the geometric mean measured concentration of 2.34 mg test item/L).

5. a) Was the study discontinued before completion?

No

5. b) Provide the reason for discontinuation

6. If the study is ongoing, what is the expected completion date?

For Registrant use only

7. Provide supplemental information here